INCOMING! Amy and Dan have been found UNHARMED! But perhaps not for long - the ruthless Irina Spasky is right on their tail. And WHAT are those crazy kids doing poking their noses into Lucian secrets?!? Are they TRYING to get themselves killed? The 39 Clues Book 5 takes Dan and Amy on their most dangerous quest yet, one that brings them face to face with the only force capable of scaring the vicious Lucians: the Madrigals.

Rick Riordan is the author of the New York Times #1 best-selling The Lost Hero, the first book in the Heroes of Olympus series. Kids across the country voted him Author of the Year for that book through the Children's Book Council in association with Every Child a Reader. Rick also penned the New York Times #1 best-selling Percy Jackson and the Olympians series: Book One: The Lightning Thief, Book Two: The Sea of Monsters, Book Three: The Titan's Curse, Book Four: The Battle of the Labyrinth and Book Five: The Last Olympian. The first two books in his Kane Chronicles, based on Egyptian mythology, The Red Pyramid and The Throne of Fire, were New York Times #1 best sellers as well. Rick lives in San Antonio, Texas, with his wife and two sons.