Landing new clients -- an eccentric and feuding family -- Dawn learns that they are searching for a treasure that will settle a tricky will left by the late patriarch, and hopes to solve the mystery before the end of summer. 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.