OVER 700,000 COPIES SOLD!
Watch where you step! Sometimes the animals in our national parks are hard to find—but you can almost always find their poop! Come along with Michael, Emily, and their family as they find poop (scat) and footprints (tracks) and discover which animal made them!
- Acadia National Park
- Badlands, Roosevelt, and Makoshika Parks (coming 2027)
- Big Bend National Park
- Black Hills
- Cascade Mountains
Moonbeam Award Winner • High Plains Award Finalist - Central Park
- Colorado Plateau
- Death Valley National Park
- Glacier National Park
- Grand Canyon National Park
2026 Creative Child Magazine book of the year - Grand Teton National Park
- Northwoods
- Olympic National Park
- Red Rock Canyon Nat’l Conservation Area
- Redwoods National and State Parks
- Rocky Mountain National Park
Next Gen Indie Book Award: Best Children’s Educational Book - Sequoia & Kings Canyon National Parks
- Shenandoah National Park
- Sonoran Desert
- Yellowstone National Park
2025 Creative Child Magazine book of the year - Yosemite National Park
The Who Pooped in the Park? series is an ideal tool for teaching young children about animal behavior, diet, and scats and tracks identification — it’s the perfect companion in the car or classroom, or in the field on your next trip to the park. Fun illustrations of the animals and their scat and tracks supplement the charming story, and a quick-reference chart at the back makes field identification a breeze.
Who Pooped in the Park? started out in Yellowstone National Park. The concept was so popular that other national parks began requesting their own editions. At first, all of the editions featured 8-year-old Michael and his family touring different parks and learning about the animals through their poop and prints. Later in the series, I added The story is similar in all of them, but the animals and landscapes are different.
A geographical look at the series
If you’re looking for a book set in your area, it may be easier to look at the series on a map instead of a list by park. This map shows which books are where, and there are more details in my blog post that looks at the Who Pooped? books state by state.
Next Generation Indie Book Award
Children’s Educational Book Winner 2025
Moonbeam Children’s Book Award
Silver Medal 2014
High Plains Book Award
Finalist 2014
Society of Children’s Book Writers & Illustrators
PAL (Published and Listed) Member
Member since 2005
New in January 2026!
This 13-page Parent/Teacher Idea Book has activities and curriculum suggestions so children can get more out of the Yellowstone edition of Who Pooped in the Park in school or at home.
Related Blog Posts
Book of the Year!
The Grand Canyon edition of my Who Pooped in the Park series was just awarded 2026 Book of the Year Award in the Fun Educational Nature Books category by Creative Child Magazine!
Announcing My 21st Who Pooped Book
I’m excited to announce that I just signed the contract for my 21st Who Pooped in the Park book: the first all-new book in the series since Central Park. It will cover three parks: Badlands National Park (South Dakota), Theodore Roosevelt National Park (North Dakota), and Makoshika State Park (Montana).
Who Pooped in Spanish—A Teaser
I’ve been wanting to say this for soooooo long: Who Pooped in the Park?—¡Ahora en español! Well, technically I can’t say that quite yet. Let me just say pronto (“soon”) instead of ahora (“now”).
Who Pooped in the Classroom
I’ve just released a free idea book for using the Yellowstone edition of Who Pooped as a teaching tool. It includes discussion topics, definitions, and activities aimed at English Language Arts, Ecology, and Geography. It includes images from the new 20th anniversary edition of the book.
An updated state-by-state look at the Who Pooped series
A few years ago, I got to wondering how many different states were covered by my Who Pooped? series, and it led to a blog post that is now obsolete, as the series has grown since then. This post updates and replaces that one. In the beginning, each book in the series was for a specific…
A huge milestone in poop!
Overall, yesterday wasn’t a great day. My tea shop’s main computer died during a Windows 10 update, our wi-fi went utterly wonky, my phone stopped making or accepting calls, I spent a bunch of time on legal documents trying to collect back wages from a former employer, and the kitchen sink backed up. Plumbing is…
When being an author is fun
Lots of people want to have written; they don’t want to write. In other words, they want to see their name on the front cover of a book and their grinning picture on the back. But this is what comes at the end of a job, not at the beginning. —Elizabeth George I’m one of…
The “Who Pooped” series goes urban!
Who Pooped in the Redwoods, which is on its way to your favorite stores and websites, is the 19th book in the Who Pooped series. Just like its predecessors, it is focused on the wide open spaces, especially national and state parks. The next book, which I’m hoping will be out by Christmas, is going…
“Who Pooped in the Cascades” took a silver medal in the Moonbeam Book Awards!
Until ten minutes ago, I had no idea that my most recent Who Pooped in the Park book was being considered for a Moonbeam award. Then I opened my email to find that Who Pooped in the Cascades has won the silver medal in the nonfiction/animals category!
Gary D. Robson 
This sounds like a fun way to learn about animals.
I’d love to see a “Who Pooped in the Prairie” book!
We enjoy your series very much! If there is any way to submit ideas or requests, we would LOVE a “Who Pooped” book set in the driftless area of the upper Mississippi River near Iowa-Illinois-Wisconsin-Minnesota, we would be so grateful. Effigy Mounds National Monument could be a location!
I have 3 boys and was given the who pooped in yellow stone. It’s their favorite bedtime read. Thank you for writing it.
I’d love to see a Who Pooped in the White Mountains, AZ
I bought “Who Pooped in the Park.” Cute book. Thought it would be perfect for my 5 year old grandkids. But then started to read it and noticed the characters don’t look anything like my grandkids who are biracial. Can’t we have more books that more accurately represent our country?
I won’t be giving the book to my grandkids.
I haven’t read any other books by Mr. Robson so my apologize if my comment does not represent his broader writings.
My earlier “Who Pooped” books (there are 20 of them now) did indeed use a white family. Since then, however, I’ve introduced multiracial kids in “Who Pooped in the Cascades” (which won a Moonbeam Children’s Book Award) and “Who Pooped in Central Park.”