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Book One

Ben Silverstein and Pearl Petal discover a secret hospital for Imaginary Creatures. When Ben accidentally leaves the door unlocked, a rather stinky and very hairy beast escapes into the town. What started out as an ordinary summer becomes the adventure of a lifetime.

Book Four

Pearl, Ben and Dr. Woo travel to the Tangled Forest to search for a lost unicorn foal. Dr. Woo suspects that Maximus Steele, a notorious poacher who collects horns, is behind the creature's disappearance. Pearl discovers that she's the only one who can search for the foal, but is she up for the challenge?

Book Two

Pearl and Ben can't wait for their first official day as apprentices of Dr. Woo. But when Pearl spots a monster in the hospital's lake, she decides to break the rules and get a closer look. Will she cement her reputation as the town's troublemaker?

Book Five

When a terrible sickness from the Imaginary World spreads throughout Buttonville, it's up to Ben and Pearl to find the only cure--a Griffin's feather. And it's also time to learn Mr. Tabby's secret.

Book Three

After meeting the mysterious dragon who lives on the hospital's roof, Ben and Pearl get to travel to the Imaginary World. Hold onto your seats, it's a bumpy ride!

Book Six

When a swarm of Sugar Fairies invades the town of Buttonville, it's Pearl and Ben to the rescue! Adventure and danger abound in this, the final installment in The Imaginary Veterinary Series. 

The Books

Activity Kit

Click below for the downloadable kit that contains party ideas, discussion questions, games, and more!
Activity Kit

Unicorn Book Trailer


-- The Sasquatch Escape won the 2014 WA State Scandiuzzi Children's Book Award


-- The Sasquatch Escape won the 2014-15 Virginia Reader's Choice Award and has been added to the following state lists: The Horned Toad List (Texas), The Sunshine State List (Florida), the Virginia Reader's Choice List, New Hamphsire Great Stone Face Award, Alaska's Battle of the Books, Oregon Battle of the Books, and the Maine Student Book Award. Also Battle of the Books (Houghton Lake Michigan) and the Sno-Isle Reading Challenge (WA), the 2018-19 Iowa Children's Choice Award list.

-- The Sasquatch Escape was named A BEST CHILDREN'S BOOK OF 2013 by Amazon

-- The Sasquatch Escape included in Amazon's TOP 20 CHILDREN'S BOOKS OF 2013

-- The Lonely Lake Monster was chosen as's Best Book of the Month (Sept, 2013)

-- Recommended by James Patterson in The Washington Post

-- Order of the Unicorn was chosen by the American Bookseller's Association as a featured book in their ABC Best Books for Children.

Starred Review. "From the first dragon sighting, readers will be thoroughly entertained with this hijinks-filled adventure story. Ben and Pearl are fun-seeking characters, while Santat's illustrations perfectly complement a story that mixes reality with the imaginary. Young readers will be anxious for future adventures in the Imaginary Veterinary series. " -- Library Media Connection/ Sept-Oct 2013

"The best books are those in which imaginary creatures leap off the page and into our world--just one of the reasons why this book is a ton of fun. I can't wait for more adventures." -- Wendy Mass, NYT bestselling author.

"An entertaining story that will pique readers' interest from the first dragon sighting. Ben is a relatable main character, and daring, outspoken Pearl is the perfect partner in crime. Santat's characteristically dynamic illustrations complement a story that will have readers eager for the next book in the Imaginary Veterinary series." -- Publisher's Weekly

"Selfors kicks off her Imaginary Veterinary series with a solid, entertaining opener. Ben and Pearl are Everykids that readers will relate to, and the adults of Buttonville are often delightfully weird and clueless. More hijinks adventure than mystery, this is sure to win an audience." -- Kirkus


"The Lonely Lake Monster is a perfect fantasy book for fourth and fifth graders." -- Newsday

Reviews and Accolades

Things have not been the same since the Buttonville Button Factory shut down. Many of the families moved away. Many of the shops closed. But mysterious things have started happening over at the old factory, which is now the home of Dr. Woo's Worm Hospital.

Buttonville Map

Eli Maynard drew this picture.

Little, Brown
United Kingdom
S. Fischer Verlag
Foreign Editions
Ordering Info
Book One: The Sasquatch Escape

ISBN: 978-0316209342
ISBN-10: 0316209341
Publisher: Little, Brown Books for Young Readers
Publication Date: April 2nd, 2013
Pages: 211

Book Two: The Lonely Lake Monster

ISBN: 978-0316225618
ISBN-10: 0316225614
Publisher: Little, Brown Books for Young Readers
Publication Date: January 7, 2014
Pages: 240

Book Three: The Rain Dragon Rescue

ISBN: 978-0316225496
ISBN-10: 0316225495
Publisher: Little, Brown Books for Young Readers
Publication Date: June 10, 2014
Pages: 224

Book Four: The Order of the Unicorn

ISBN: 978-0316364072
ISBN-10: 031636407X
Publisher: Little, Brown Books for Young Readers
Publication Date: February 3, 2015
Pages: 224

Book Five: The Griffin's Riddle

ISBN: 978-0316286916
ISBN-10: 0316286915
Publisher: Little, Brown Books for Young Readers
Publication Date: August 4, 2015
Pages: 256

Book Six: The Fairy Swarm

ISBN: 978-0316286930
ISBN-10: 0316286931
Publisher: Little, Brown Books for Young Readers
Publication Date: October 27, 2015
Pages: 240

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