When Sid, his annoying third-grade classmate, ruins Song Lee's origami praying mantis, Horrible Harry plots triple revenge on the troublemaker.

Amy and Dan are shocked to learn that Outcast, a violent renegade who is threatening the lives of innocent people, may be a Cahill family member who is determined to exact revenge.

"Supernova...finds Nova and Adrian struggling to keep their secret identities concealed while the battle rages on between their alter egos, their allies, and their greatest fears come to life. Secrets, lies, and betrayals are revealed as anarchy once again threatens to reclaim Gatlon City."--

"Twins Myles and Beckett face off against Lord Teddy Bleedham-Drye, the Duke of Scilly, who has been plotting revenge against them since they humiliated him"-- Provided by publisher.

Thirteen-year-old Dan Cahill and his older sister, Amy, are running out of time. An exiled Cahill known as the Outcast has already recreated of history's worst disasters, and he's saved the worst for last. If Dan and Amy can't find and stop Outcast fast, he will initiate a full-scale nuclear meltdown.

Agreeing to join the mysterious Kian's magical faction to exact revenge on a group of bullies who have tormented her, Edie transforms into a beautiful girl and begins to sabotage the bullies' inner circle only to discover dark truths about Kian's world.

Pip lives by his wits in the city of Clarel. When he picks the wrong pocket, he finds himself in possession of a strange dried heart in a silver casket--and those who lost it will stop at nothing to get it back. With assassins on his trail and the ominous heart beginning to whisper to him, Pip and his childlike older sister El are drawn deeper into the forbidden world of magic. Now they must seek the help of the secret witches of Clarel and Princess...