The gang tries to rescue Jenny from the retirement home, but when Atticus' disgruntled minion Bob uses the book to create a feast that makes everyone who eats it hungrier, they're forced to fight an army of seniors hungry for human flesh.
Jenny's father, now out of his coma, tries to join the gang, but when he's rejected, he uses the book to steal people's skin and disguises himself as various male students to infiltrate the gang.
When cheerleaders start disappearing from the school hallways, leaving only their shredded uniforms behind, the gang becomes convinced that they've been eaten by a mysterious creature called The Beast.
An environmentalist fanatic becomes fed up with the littering going on at the school and uses the book to turn the school and everyone in it prehistoric.
After being embarrassed in an online game by Todd and Curtis, a student uses the book to turn the school into a live-action RPG which the gang must battle through.
Jimmy is fired for peeping on girls in the changing room and Todd vows to clear his name, but the gang find the real culprit difficult to identify - because he's invisible.
The gang make plans for a surprise party for Curtis's birthday, while a Puritan girl uses the book to make herself a giant birthday cake that eats students on their birthdays.
The Phantom of Crowley High returns and switches roles with Hannah to get Curtis back. The three dudes realize that Todd must lose his virginity to become the Pure Evil One. Atticus comes to terms with his past. And nobody can stop singing.
When a paraplegic student uses the book to give himself fast legs, Todd jumps on his back and gets transported to the future, where Atticus has taken over as Satanic Overlord.
Atticus takes the book and brainwashes the students of Crowley High to do his bidding, forcing a showdown with Todd at the semi-formal. Secrets are revealed, romances blossom and tragedy strikes, threatening to tear apart the gang for good.