When Ben Silverstein is sent to the rundown town of Buttonville to spend the summer with his grandfather, he's certain it will be the most boring vacation ever. That is, until his grandfather's cat brings home what looks like . . . a baby dragon?

Amazed, Ben enlists the help of Pearl Petal, a local girl with an eye for adventure. They take the wounded dragon to the only veterinarian's office in town -- Dr. Woo's Worm Hospital. But as Ben and Pearl discover once they are inside, Dr. Woo's isn't a worm hospital at all -- it's actually a secret hospital for imaginary creatures.

After Ben...

Pearl Petal and Ben Silverstein can't wait for their first official day as apprentices of Dr. Woo, veterinarian for imaginary creatures. That is, until they are tasked with clipping the sasquatch's toenails. Gross
Then Pearl spots a monster in the lake behind the hospital. Even though they were told not to leave the building for any reason, Pearl sets off for a closer look, with Ben trailing cautiously behind.
The outing goes awry when Ben is captured by the creature and held hostage on an island in the middle of the lake. It's up to Pearl to hatch a rescue mission. Will...

Now in paperback--the sixth and final book in this funny, fantastical series!

Someone or something is stealing from the peaceful residents of Buttonville. But is the thief from the real world...or the imaginary one? Ben and Pearl are about to find out. When they report for duty at Dr. Woo's, Mr. Tabby hands them a bucket and a shovel -- for the collection and proper disposal of dragon droppings -- and directs the apprentices to the hospital's roof. Soon, they come face-to-snout with the dragon that lives there and find a pile of proof that he is the thief.
Before Ben and Pearl can persuade the dragon to stop stealing, an emergency call comes in from...

At Dr. Woo's Worm Hospital, Pearl and Ben are greeted with some bad news. A human has been spotted in the Imaginary World Dr. Woo suspects it might be Maximus Steele -- a poacher with his sights set on prized animal horns. What creature will he attack next? Will it be a unicorn?
Together, Pearl, Ben, and Dr. Woo travel to the Tangled Forest. It's an amazing, colorful, and wild place. Ultimately, the responsibility falls to Pearl to find the lost unicorn. But in a land of fire-breathing insects and flesh-eating flora, is she up for the challenge?
Suzanne Selfors delivers a wild...

At Dr. Woo's Worm Hospital, Pearl and Ben are greeted with some bad news. A human has been spotted in the Imaginary World Dr. Woo suspects it might be Maximus Steele -- a poacher with his sights set on prized animal horns. What creature will he attack next? Will it be a unicorn?
Together, Pearl, Ben, and Dr. Woo travel to the Tangled Forest. It's an amazing, colorful, and wild place. Ultimately, the responsibility falls to Pearl to find the lost unicorn. But in a land of fire-breathing insects and flesh-eating flora, is she up for the challenge?
Suzanne Selfors delivers a wild...

A mysterious sickness from the Imaginary World is sweeping the town of Buttonville. Dr. Woo, Metalmouth, and even the sasquatch have fallen ill. According to Mr. Tabby, the only known cure is a griffin's feather, but there is none in the hospital.
Keeping an eye out for Maximus Steele, a poacher wanted for crimes against Imaginary creatures, Ben, Pearl, and Mr. Tabby make their way through the Portal. But danger looms on the other side. Can they persuade the griffin, king of the Imaginary World, to surrender a feather? And at what cost?
Suzanne Selfors delivers a wild journey filled...