In Magic 2.0 (which starts with "Off to be the Wizard"), reality is a computer program and the protagonist finds a file that lets him edit the variables underlying everything, which lets him do magic. I appreciate the premise because that could be the nature of reality, though I think Perfect State by Brandon Sanderson deals with the idea in a more interesting way.
Scott Meyer doesn't focus on developing the magic system in Magic 2.0, so various events seem either implausible or deus ex machina. I will admit, though, that much of the implausibility could be explained by many of the characters in the book being stupid.
Despite that, the book is a fun and funny adventure novel, and I plan on reading the remaining books in the series.