Toni Buzzeo s first two books in the series, Whose Tools? and Whose Truck?, have sold more than fifty thousand copies. Toni is the author of the 2013 Caldecott Honor Book and New York Times bestseller One Cool Friend, as well as many other books for children.

A former elementary school librarian and secondary teacher, she now presents at schools, national and international library and reading conferences, and in district and regional staff development trainings. Buzzeo lives with her husband in Arlington, Massachusetts.

Joe Cepeda was born and raised in East Los Angeles. Joe’s journey through college began with studying engineering at Cornell and finished with a BFA in Illustration from Long Beach State. Months from leaving school, Joe went to New York and secured a book contract after his first meeting with a publisher. He’s now the award-winning illustrator of more than thirty books for children.