Open this Little Book

This book is so cool in such a particular way that it makes me want to use words like "keen" and "neat". It opens with a little red book about a ladybug, who is reading a smaller green book about a frog, who is reading an even smaller orange book about a rabbit, and so on until they are all helping a giant read a teeny tiny rainbow book. The illustrations are charming, the concept unique, the execution fantastic (and keen, and neat).