Beginning readers are introduced to the detective mystery genre in these chapter books. Perfect for the Common Core, kids can problem-solve with Nate, using logical thinking to solve mysteries!  All aboard the Owl Express! Someone on the train is out to get Olivia’s pet owl, Hoot. But whooo? Nate the Great and his dog, Sludge, hit the rails to help out. Then Hoot disappears! Can Nate solve the mystery? Check out the Fun Activities section in the back of the book!  Visit Nate the Great and Sludge! NatetheGreatBooks.com "With plenty of suspects, comical plot twists, and a satisfying resolution. . . . A strong addition to a popular series."--School Library Journal