Mary Anne and the Secret in the Attic — Ann M. Martin

America's favorite baby-sitters are detectives, too!

Mary Anne's mother died when Mary Anne was just a baby. And since it makes Mr. Spier too sad to talk about her, Mary Anne hardly knows a thing about her mother. Mary Anne respects her father's feelings. But lately, she wants to know more. She has to find out about her mother.

So Mary Anne does something she knows is wrong. She goes up into the creepy, ghostly attic in her and Dawn's house to look for evidence.

And there Mary Anne finds something she wishes she never had...