Looking for Answers about Random House, Inc Harriet the Spy, Double Agent?

Harriet M. Welsch has a new friend who goes by multiple aliases-Annie Smith, Yolanda Montezuma, Rosarita Sauvage, and Zoe Carpaccio-but who is she really? She reveals very little information about herself, and when she does it usually isn't true. Harriet discovers that Annie is meeting an older man on the weekends and she is determined to use her finely honed spy skills to find out who exactly Annie Smith is.