The Mermaid Man & Barnacle Boy Book is a comic book that only appeared in the episode Ditchin'.
The book's cover is red with a yellow comic book bubble inside it. The title is written in a blue, "3-D" font. On the top left corner is a picture of Mermaid Man's head; on the bottom right corner is a picture of Barnacle Boy's head.
The Mermaid Man and Barnacle Boy Book was first and only seen when SpongeBob and Patrick attended the book store. SpongeBob and Patrick had their copies signed by Mermaid Man and Barnacle Boy themselves before leaving the book store.
- Oddly, Mermaid Man and Barnacle Boy acted like they didn't know SpongeBob and Patrick though in previous episodes, they know the two well. Perhaps this comes before all those other episoes.
- SpongeBob read this book, without Patrick's knowledge, in a "The Clash of Triton" short, "The Story of King Neptune" to be exact.