Katherine Applegate is the Newbery Medal-winning and #1 New York Times bestselling author of numerous books, including The One and Only Ivan, The One and Only Bob, Crenshaw, Wishtree, the Endling series, the Roscoe Riley Rules chapter book series, and the Animorphs series, which she coauthored with her husband, Michael Grant. Katherine lives with her husband and their children in California. You can visit her online at www.katherineapplegate.com or visit www.theoneandonlyivan.com. Michael Grant, author of the Gone series, the Messenger of Fear series, the Magnificent Twelve series, and the Front Lines trilogy, has spent much of his life on the move. Raised in a military family, he attended ten schools in five states, as well as three schools in France. Even as an adult he kept moving, and in fact he became a writer in part because it was one of the few jobs that wouldn't tie him down. His fondest dream is to spend a year circumnavigating the globe and visiting every continent. Yes, even Antarctica. He lives in California with his wife, Katherine Applegate, with whom he cowrote the wildly popular Animorphs series. You can visit him online at www.themichaelgrant.com and follow him on Twitter @MichaelGrantBks.