The Mysterious Moonstone

Gr 2–5—After the mysterious exit of everyone's favorite librarian, Mrs. Hillard, Cleo and Evan discover an antique book that may lead them to her. Upon opening the book, a secret door appears, leading them to a massive underground library. From there, the students find a letter from the beloved Mrs. Hillard imploring them to aid her by entering books and helping finish the stories. If they succeed, Cleo and Evan will find Mrs. Hillard and restore her to her rightful place at school. If they fail, they will meet the same fate as she—locked inside the books forever. The pair soon find themselves in 19th-century England, where they become assistants to Detective Artie Baker and go on a hunt for a priceless stolen gem. The detectives enter into a pursuit to find the culprit and end the story. Though this title is a bit slow to start, once the adventure begins in earnest, it is exciting, with just enough mysteries and clues to please readers. Luper's delectable humor is appropriate for the intended age group, and the plot will keep readers' attention to the end. Comparable to "Nancy Drew and the Clue Crew" and "A to Z Mysteries," this is a satisfying read for beginning independent readers.