You will discover that this book can be:

A secret message -tear out a page, write a note on it for a stranger, and leave it in a public place.

A recording device -have everyone you contact today write their name in the book.

An instrument -create as many sounds as you can using the book, like flipping the pages fast or slapping the cover.

This Is Not a Bookwill engage readers by having them define everything a book can be by asking, 'If it's not a book, what is it then?' - with a kaleidoscope of possible answers.