Title: Flashpoint (The 39 Clues: Unstoppable #4)
Author:Gordon Korman
Summary: Tick Tock. Sixteen-year-old Amy Cahill only has few days to live. There’s a poison coursing through her, and her only chance is to collect ingredients for an antidote. Too bad the antidote ingredients are scattered around the world. And too bad that survival is by far Amy’s smallest problem.

The antidote she needs is also the only thing capable of stopping a deadly enemy. J. Rutherford Pierce is on the brink of becoming the most powerful man in the world, and if he does, no one will be safe. Amy and her younger brother, Dan, will do everything it takes to bring Pierce down. Even if Amy must pay the ultimate price.

Review:  Brilliant. Gordon Korman adds a new twist to the unstoppable series. With so many losses and casualties, Amy and Dan barely survive. But in the ends, the Cahills will truimph. With the help of April May, they save the world in a spectacular way. Amazing.

Recommended for: Fans of the unexpected traitors among enemies, and adventure.