Thirteen-year-old Dan Cahill and his older sister, Amy, are the latest guardians of the Clues -- thirty-nine ingredients in a serum that transforms whomever takes it into the most powerful person on earth. They think they've done everything right, but a tiny mistake leads to catastrophe. The serum is missing and Dan and Amy have to get it back and stop who stole it ... before it's game over.

When an enemy finds a way to use the source of the Cahill family's power against them, siblings Dan and Amy embark on a desperate mission that will take them from one extreme of the Earth to another, but Dan may have to face the one terror he never imagined--betrayal by his own sister.

Amy and Dan Cahill have their final confrontation with twisted billionaire J. Rutherford Pierce, a man whose power has no limits and is one step away from being elected president.

"From the international bestselling author of All the Birds in the Sky, Charlie Jane Anders, comes Dreams Bigger Than Heartbreak, the sequel to Victories Greater Than Death in the thrilling adventure Unstoppable series. They'll do anything to be the people they were meant to be - even journey into the heart of evil. Rachael Townsend is the first artist ever to leave Earth and journey out into the galaxy - but after an encounter with an alien artifact,...

With only a ragtag band of misfits, crewmates, earthlings, friends, lovers--and one annoying frenemy--the Unstoppable Crew are up against the universe, and in order to survive, they may have to cross a once forbidden line. They're the galaxy's most wanted--and our only hope. When Elza became a space princess, she thought she'd be spending her time at the palace, wearing gorgeous couture and soaking up everything there is to know--but instead, she's...