My Invented Life — Lauren Bjorkman

With Roz and Eva everything becomes a contest -- who can snag the best role in the school play, have the cutest boyfriend, pull off the craziest prank. Still, they're as close as sisters can be. Until Eva deletes Roz from her life like so much junk e-mail for no reason that Roz understands. Now Eva hangs out with the annoyingly petite cheerleaders, and Roz fantasizes about slipping bovine growth hormone into their Gatorade.

Roz has a suspicion about Eva. In turn, Eva taunts Roz with a dare, which leads to an act of total insanity. Drama geeks clamor for attention, Shakespearean insults fly, and Roz steals the show in Lauren Bjorkman's hilarious debut novel.