Pregnant Chelsea Clinton is getting dressed for a tour in Los Angeles

Chelsea Clinton is a real jet set across the country and promotes her latest illustrated children's book – but when you juggle and have an agenda full of events, dressing for comfort is key.

The 39-year-old, currently pregnant with her third child with husband Marc Mezvinsky, 41, stopped on Saturday at the Los Angeles Times Festival of Books to talk about Do not Let Them Disappear, her new children's book on animals and endangered species.

The mother of the two was nonchalant when she spoke on stage and signed autographs, with fitted dark jeans, a white blouse, a gray blazer and practical old sneakers.

On tour: Chelsea Clinton spoke at the Los Angeles Times Festival of Books on April 14

On tour: Chelsea Clinton spoke at the Los Angeles Times Festival of Books on April 14

The 39-year-old was comfortably and casually dressed in dark jeans, a loose top, a gray blazer and filthy sneakers.

The 39-year-old was comfortably and casually dressed in dark jeans, a loose top, a gray blazer and filthy sneakers.

She kept quiet before the appearance of the book tour

She kept quiet before the appearance of the book tour

Chilling & # 39 ;! The 39-year-old was comfortably and casually dressed in dark jeans, a loose top, a gray blazer and filthy sneakers.

Spreading the message: Chelsea is promoting her latest children's book called Do not Let Them Disappear

Spreading the message: Chelsea is promoting her latest children's book called Do not Let Them Disappear

Spreading the message: Chelsea is promoting her latest children's book called Do not Let Them Disappear

Bumpy: She showed a hint of her baby bump on stage during a conversation with the Mary McNamara of the Los Angeles Times

Bumpy: She showed a hint of her baby bump on stage during a conversation with the Mary McNamara of the Los Angeles Times

Bumpy: She showed a hint of her baby bump on stage during a conversation with the Mary McNamara of the Los Angeles Times

Chelsea has been busy promoting her book this month since its release on April 2. This weekend she was in Los Angeles to celebrate the book, her sixth book.

She participated in the Los Angeles Times Culture Critic and Columnist Mary McNamara for a discussion on stage and then signed books for fans who turned up.

During the conversation, Chelsea spoke about children's books and animals and called elephants her favorite.

According to Lisa Ann Jacobs, editor of The Palos Verdes Peninsula News, the former first daughter joked: & I don't hold elephants responsible for their association with the GOP. & # 39;

Chelsea has been incredibly busy in recent weeks and stopped in bookshops and zoos throughout the country for her promotional tour.

Grubby: the expectant mother traded in her favorite pair of worn-out naked heels for a pair of dirty-looking Superga sneakers

Grubby: the expectant mother traded in her favorite pair of worn-out naked heels for a pair of dirty-looking Superga sneakers

Grubby: the expectant mother traded in her favorite pair of worn-out naked heels for a pair of dirty-looking Superga sneakers

Funny! The former first daughter said elephants are her favorite animal and joked: & # 39; I do not hold elephants responsible for their association with the GOP & # 39;

Funny! The former first daughter said elephants are her favorite animal and joked: & # 39; I do not hold elephants responsible for their association with the GOP & # 39;

Funny! The former first daughter said elephants are her favorite animal and joked: & # 39; I do not hold elephants responsible for their association with the GOP & # 39;

Signatures: Chelsea also signed books for attendees who enjoyed it during the event

Signatures: Chelsea also signed books for attendees who enjoyed it during the event

Signatures: Chelsea also signed books for attendees who enjoyed it during the event

Last week she visited the Philadelphia Zoo, where she was given a tour by Dr. Andy Baker.

& # 39; We were so impressed with the incredible (& difficult!) Questions the children asked us & # 39 ;, she tweeted about the event.

She also went to the Maryland Zoo, where she sat for a nice photo with a group of curious penguins.

& # 39; I loved meeting the polar bears, rhino and penguins @marylandzoo and their amazing keepers. A clear #DontLetThemDisappear tour highlight! & # 39; she tweeted.

Her schedule also included The Smithsonian & # 39; s National Zoo in Washington, D.C., who had had her memories recalled a visit during her father's years in the White House.

& # 39; I have so many wonderful memories growing up at @NationalZoo and especially cherished my visits there with my grandmother in the last years of her life. It was great to see the panda & # 39; s she loved so much, & tweet them.

Chelsea seems to be the smart packer for her back-to-back trips, where they carry the same pair of pieces again at each stop.

Her uniform for most of her non-television appearances consisted of dark blue jeans, her comfortable sneakers and her gray blazer, while she takes off the blouse underneath.

Pit stop: The mother of the two has been quite busy promoting her book this month and has stopped at different zoos for the tour - including the Philadelphia Zoo

Pit stop: The mother of the two has been quite busy promoting her book this month and has stopped at different zoos for the tour - including the Philadelphia Zoo

Pit stop: The mother of the two has been quite busy promoting her book this month and has stopped at different zoos for the tour – including the Philadelphia Zoo

Make it easy: the smart packer seems to have packed very light and recycling outfits during her trip, the same look two days before her appearance in Los Angeles

Make it easy: the smart packer seems to have packed very light and recycling outfits during her trip, the same look two days before her appearance in Los Angeles

Make it easy: the smart packer seems to have packed very light and recycling outfits during her trip, the same look two days before her appearance in Los Angeles

Practical: last week she also stopped at the Maryland Zoo - she wore the same jeans, blazer and colored sneakers, but swapped her top

Practical: last week she also stopped at the Maryland Zoo - she wore the same jeans, blazer and colored sneakers, but swapped her top

Practical: last week she also stopped at the Maryland Zoo – she wore the same jeans, blazer and colored sneakers, but swapped her top

Fun with the animals! She posed for a cute photo with some penguins

Fun with the animals! She posed for a cute photo with some penguins

Fun with the animals! She posed for a cute photo with some penguins

Thanks! She thanks the zoos she visits, and gives a call to the staff at this one in Baltimore

Thanks! She thanks the zoos she visits, and gives a call to the staff at this one in Baltimore

Thanks! She thanks the zoos she visits, and gives a call to the staff at this one in Baltimore

Memories: She also remembered that she had been to Smithsonian National Zoo in Washington, D.C. when she was a child

Memories: She also remembered that she had been to Smithsonian National Zoo in Washington, D.C. when she was a child

Memories: She also remembered that she had been to Smithsonian National Zoo in Washington, D.C. when she was a child

No messing around: she put on her familiar jeans, sneakers and gray blazer for the occasion

No messing around: she put on her familiar jeans, sneakers and gray blazer for the occasion

No messing around: she put on her familiar jeans, sneakers and gray blazer for the occasion

The expectant mother, who will have her third child this summer, seems to prefer blushing blouses that bump her baby.

She was certainly the bumpiest of her stops at Maryland Zoo, and she wore a light green top with a bow.

She was a little more glamourous earlier this month when she returned home to New York City and appeared on Good Morning America, dressed in a pale pink dress and bare heels for an interview with Robin Roberts.

When asked what motivated her to choose this topic for her book – she has already covered inspirational women and how children can make a difference – she said it came up with popular demand.

& # 39; One, I have always heard of children, my nieces and nephews, other children I met while working on my other books, that one of the subjects they care about most is animals, & # 39; she said. & # 39; Animal welfare in their own community, saving endangered species.

& # 39; And I also remember when I was a kid, the first problem I really felt was made up by trying to save animals.

Small but growing! Earlier this month she rocked her little baby bump on Good Morning America

Small but growing! Earlier this month she rocked her little baby bump on Good Morning America

Small but growing! Earlier this month she rocked her little baby bump on Good Morning America

Promotion: she spoke to Robin Roberts about her book at the beginning of April

Promotion: she spoke to Robin Roberts about her book at the beginning of April

Promotion: she spoke to Robin Roberts about her book at the beginning of April

& # 39; And so I wrote this book for children today and also because I wanted to have this book as a child. To talk about the animals that imprisoned my heart and imagination such as elephants, and also so that I could know what I had to do to save them. & # 39;

Her own children are also animal lovers. Chelsea said the four-year favorite Charlotte is the shark.

& # 39; She tells everyone that we will listen that we kill 100 million sharks every year, which we do. And a little bit why she thinks that's terrible, what it is, & she said.

Now out: her latest book, Do not Let Them Disappear, is about animals

Now out: her latest book, Do not Let Them Disappear, is about animals

Now out: her latest book, Do not Let Them Disappear, is about animals

& # 39; My son [two-year-old Aiden] a little seems to have a different animal every week, but this week they are tigers. And he likes that tigers are one of the few cats that swim. He likes that very much. So now in the bathtub, he claims he's a tiger. & # 39;

More important than the topic discussed, however, is the impact that books can have on children – which, according to Chelsea, is a point that has driven home since she had one herself.

& # 39; Children's books are really the first ways in which we increase or limit a child's imagination, & # 39; she said.

& # 39; What we say is possible for them as themselves, in the world, and although I knew that academically as I grew older, I could really feel and understand it because I saw it happening in our own home.

& # 39; So I am just as grateful to be able to share stories and information that I hope are more powerful for children, because I think this is really what we should do for all our children. & # 39;

Chelsea and Marc have two children juggling and are now preparing to add a fifth member to their family. Chelsea admitted that it's going to be a big change, but also said she had a lot of advice.

Fun: She said her four-year-old daughter Charlotte's favorite animal is a shark (pictured with grandfather and grandfather)

Fun: She said her four-year-old daughter Charlotte's favorite animal is a shark (pictured with grandfather and grandfather)

Fun: She said her four-year-old daughter Charlotte's favorite animal is a shark (pictured with grandfather and grandfather)

Flashback: Chelsea said she chose animals as her newest subject because she was very fond of it as a child

Flashback: Chelsea said she chose animals as her newest subject because she was very fond of it as a child

Flashback: Chelsea said she chose animals as her newest subject because she was very fond of it as a child

& # 39; Well, my husband is one of 11 – yes – it's really great because so many of his older siblings are actually parents of three, so we get really good advice on how to make the transition from two to three can arrange & # 39 ;, she said. .

& # 39; But we know we will be in the minority. That is inevitable. & # 39;

Chelsea has promoted her fourth children's book and said that reading is a big thing in her house.

& # 39; We read for our little ones every night and luckily they love books & she said. & # 39; It is also our daughter's favorite strategy to push back bedtime. She knows that it is very difficult to say no to one more book. & # 39;

While she and Marc generally stick to their guns, grandmother and grandfather are less strict with their grandchildren and & # 39; always give up before going to sleep & # 39 ;.

& # 39; My husband and I are much more precise to say & # 39; No, 7:30 am, lights off & # 39 ;. My parents are much easier to persuade. "Of course you want another story!" & # 39; she said.