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!