Have You Seen Hyacinth Macaw? — Patricia Reilly Giff

With a memo book full of notes, junior detective Abby Jones and her pal Potsie piece together confusing clues and soon they are trying to unravel more than one mystery.

Squeezing through windows, sneaking onto subways, and slithering into an empty apartment during the night, Abby must make sense of the puzzling information that she is piling up. She is hot on the trail, but can she solve the case?