Tyrese Gibson's Mayhem!There was a strange appearance at Apple’s Rock and Roll even this past Wednesday, and I’m not talking about Steve Jobs. It was Tyrese Gibson, an actor from the movies Death Race and Transformers 2. What makes Gibson’s appearance strange isn’t his movies, though. It’s his book.

Gibson made his mark in Apple history when his comic book “Mayhem!” became the first book available from iTunes. Granted, this isn’t a full-fledged novel, but it is the first example of how a book would work in iTunes, and could be an indication of what’s to come. The first episode of the comic comes from iTunes LP, where buyers will get additional video and audio extras along with a stylized presentation of the comic.

Couple this with Jobs’ comments about a multi-purpose device that has an e-reader built in and I say we have more evidence that the Apple tablet is an issue of “when,” not “if.”