Cypress Professional Group: 2 books

Harriet the class hamster has been hamster-napped! Cece's supposed to be taking care of the precious pet but everything goes wrong. She loses Harriet. And then she receives a ransom note with a picture of Harriet in front of a snake's cage! Will the class hate her when they find out? Can she save Harriet...

Cece's sister has gone crazy. She believes aliens have landed in their backyard. And what's going on with that stray dog? The girls are on a new case investigating strange lights and sounds coming from the field behind their house. Dee Dee disappears for long periods of time, and Cece wants to know...