King & Kayla are back on the case in this laugh-out-loud mystery from the Theodor Seuss Geisel Honor Award-winning series. Kayla needs to return her library books, but she can't find one of them. King knows that if they don't return all the books, they can't check out more--and that means no new stories. Analytical Kayla retraces her steps, with the assistance of their friend Jillian. Sensitive King smells a library book. Could...