"Harriet the Spy" & "The Long Secret" by Louis Fitzhugh
"Harriet the Spy": Harriet M. Welsch is a spy. In her notebook, she writes down everything she knows about everyone, even her classmates and her best friends. Then Harriet loses track of her notebook, and it ends up in the wrong hands. Before she can stop them, her friends have read the always truthful, sometimes awful things she’s written about each of them. Will Harriet find a way to put her life and her friendships back together?
"The Long Secret": Harriet the Spy refuses to become ruffled when an unidentified person starts leaving disturbing notes all over the quiet little beach town of Water Mill. She’s determined to discover the author of the notes. And she drags her friend, mousy Beth Ellen, into all kinds of odd and embarrassing situations in her efforts to reveal the culprit. Observing in her own special, caustic way with her ever-present notebook, Harriet the Spy is on the case. But will she be ready to face the truth when she finds it?