Hahn, Mary Downing (2007). Deep and Dark and Dangerous. 187 pages. Grades 4-7.
While searching through the attic, thirteen year-old Ali finds an old photograph of her mother and aunt at their lake house in Maine. She notices that the photo is torn away where a third figure would have been next to her mother and aunt. The only clue to the person's name is the letter 'T' on the back. Who could it be and why did someone tear them out of the picture?
Ali's aunt, Dulcie, invites her to go back to the Maine lake house for the summer and babysit her daughter Emma while she works on her paintings. Ali agrees hoping that she will learn more about the person who was once in the old photograph. When they arrive, Emma and Ali meet a girl named Sissy, who is not very nice to girls, but won't leave them alone. She tells them about a girl named Teresa who drowned during the summer while their mothers were at the lake house. Could Teresa be the mysterious girl from the photograph?