Books with title Secret Sabotage: Book One in the Sabotage Mystery Trilogy by Keene, Carolyn

This beginning of a brand-new trilogy follows Nancy’s adventures at a creepy carnival. Nancy needs to find out who is writing the gossipy Burn Book Blog and, later, passing along threatening notes to popular girl Lexi Claremont. To do so, she must go undercover as one of the in-crowd, working the fro-yo stand at the town carnival. True to her sleuthing abilities, Nancy manages to solve this first mystery—but uncovers more trouble while she’s at it. Read on in book #43 to find out what happens next!

Everyone knows about the online group BetterLife. But what starts out as a fun virtual reality site turns into a living nightmare for Bess's twelve-year-old sister and her friends when one of them becomes a target of cyberbullying! I create my own BetterLife profile to investigate how the program works and find out who could be targeting the girl and why. But nothing online is what it seems -- everyone is hiding behind their virtual identities. It's almost impossible to track down who is behind anything! Is this a simple case of middle school girls being mean to each other, or could it be something scarier? It's up to my friends and me to do some cyberdigging and unmask the secret identities of the BetterLife bullies!