The griffin's riddle - Suzanne Selfors

Ten-year-olds Ben Silverstein and Pearl Petal have had quite
a busy summer in the typically quiet town of Buttonville. Ever since Dr. Woo
opened her doors, things have been more exciting than the senior center on
pudding day! Together, Ben and Pearl have encountered all sorts of magical
beasts -- from a sasquatch, to a lake monster, to a leprechaun, to a dragon, to
a unicorn.

In The Griffin's Riddle, when Ben and Pearl discover that Dr. Woo
and the sasquatch are both sick with Troll Tonsillitis, the two must travel to
the Imaginary World in search of the only cure -- a griffin's feather. But can
they convince the "King of Creatures" to surrender one? And at what cost?

Suzanne Selfors delivers a wild journey filled with mythical creatures
and zany adventures that are anything but imaginary.

This book includes bonus writing, art, and science activities
that will help readers discover more about the mythological creatures featured
in The Griffin's Riddle. These activities are designed for the home and
the classroom. Enjoy doing them on your own or with friends!

Suzanne Selfors (Author)
Best-selling author, Suzanne Selfors, feels like a royal on some days and a rebel on others. She's written many books for kids, including the Smells Like Dog series and The Imaginary Veterinary series.
She has two charming children and lives on a magical island kingdom where she hopes it is her destiny to write stories forever after.

Dan Santat (Author)
Dan Santat is the Caldecott Medal-winning and New York Times bestselling author and illustrator of The Adventures of Beekle: The Unimaginary Friend, as well as the illustrator of many other picture books, including Crankenstein by Samantha Berger. Dan lives in Southern California with his wife, two kids, and various pets.