"Book three in the identity mystery trilogy."

"My online sleuthing has led my friends and me down the Internet rabbit hole. After joining BetterLife, an online community, to try to stop a case of cyberbullying from the inside, the bullies turned on me. And now I'm close to revealing their true identities in real, off-line life. All the clues I've found have pointed me in one direction, but is it a false trail? Before I can expose the madmen behind the mayhem, I need to be absolutely sure that they're the ones wreaking havoc all over BetterLife. But how can I be sure when nothing on the Internet is as it seems? Catching this crook might be more difficult than even I anticipated!" -- P. [4] of cover.