Number one New York Times bestselling author Tad Hills returns with an all-new Level 1 Step into Reading story about Rocket's 100th day of school.

Rocket, the beloved dog from the New York Times bestselling picture books How Rocket Learned to Read and Rocket Writes a Story, is busy collecting 100 things to take to school on his 100th day, and he has the perfect place to keep them safe. That is, until Bella, a squirrel who loves acrorns, gets involved.

With predictable patterns, simple words, lots of repetition, and bright, colorful illustrations, this new Rocket book will charm young readers--and they can read it all by themselves!