The cover is yellow with the red numbers 1, 2, and 3. On the inside there are white pages with giant red numbers that nearly fill the pages. The numbers are consecutive to the pages, and are the only things in the book.
Role in the episode
Patrick was seen reading this book where he was literally counting the numbers in it. He decided to get the book until SpongeBob came inside and wanted to buy some Mermaid Man and Barnacle Boy trading cards. Patrick eventually abandoned buying 1 2 3 and bought a pack of cards himself.