Pick-your-own-path and puzzle-packed mystery collide in the first book in Lauren Magaziner's new hilarious and high-stakes middle grade series in which the reader must help Carlos and his friends put together the clues to save his mom's detective agency. n n In this wildly entertaining and interactive adventure, YOU pick which suspects to interview, which questions to ask, and which clues to follow. You pick the path-you crack the case! n n Carlos Serrano has never solved a mystery in his life. But when Carlos's mom gets sick with a nasty flu on the morning of an investigation that could save her failing detective agency, Carlos takes on the case. n n With the help of his best friend, Eliza, and her wild little brother, Frank, Carlos must uncover a mystery involving an eccentric local millionaire, anonymous death threats, and a buried treasure.

But with tricky riddles, cagey suspects, hidden secrets, and dozens of impossible choices, they need your help! n n Can you help Carlos and his friends find the culprit and save Las Pistas Detective Agency? Or will it be case closed? n