Joslyn Willems - an adventurer at heart - discovers an old leather-bound novel among the other titles in a town bookstore. The book, full of adventure, peril, and mystery, not in its pages, but in its bookmark. "The cover, embossed with spirals of silver and gold , seemed to depict a storm-tossed sea that carried a pirate ship in its swells. The book - titled something along the lines of "Wil Swallow's Adventures" - held a secret, not in its pages, but in the simple cloth bookmark sewn to the cover, inside a pocket sat a long-forgotten key. This key is how the adventure of a lifetime began." Follow Joslyn as she discovers the mysteries of the West Side Book Emporium and embarks on her own adventure full of peril and mystery of its own.