Into the Gauntlet
 Into the Gauntlet is the tenth book in The 39 Clues novel series. It was written by Margaret Peterson Haddix and released on August 31 2010. In the beginning of the book Amy and Dan think about if they ever should have joined the clue hunt and every misfortune they've had. Their lead is a poem found in their hotel room. However it is then stolen by Isabel Kabra.