Mallory and the Trouble with Twins (The Baby-Sitters Club #21) A Geronimo Stilton Adventure

Geronimo's sister Thea Stilton narrates this action-packed adventure! When the Thea Sisters' good friend Bridget has to return to Scotland to help her family repair their ancient castle the five mice offer to help their friend in whatever way they can. Little do they know that Bridget will be kidnapped and they'll have to rush to Scotland to help find her! Along the way the Thea Sisters encounter Celtic legends cryptic messages and hidden treasures on a trip that's full of mysteries and surprises!

Ann M. Martin is the creator of The Baby-sitters Club, which has more than 190 million books in print, making it one of the most popular series in the history of publishing. Her novels include A Corner of the Universe (a Newbery Honor Book), Belle Teal, Here Today, A Dog's Life, On Christmas Eve, and the Main Street and Family Tree series, as well as the much-loved collaborations P.S. Longer Letter Later and Snail Mail No More, with Paula Danziger. Ann lives in upstate New York.