Rebecca loves everything about summer camp, but making friends turns out to be harder than she expected. What secret is her bunkmate hiding—and why? When camp pranks start getting out of hand and a girl goes missing, Rebecca is determined to find out what's really going on at Camp Nokomis. At the end of the story, the Looking Back section provides interesting facts about summer camps in Rebecca's time.

When Rebecca is put in charge of the new neighbors' baby, she hesitates to take on such a responsibility—especially with a kidnapper on the loose in New York! While her brother creates trouble in the neighborhood, Rebecca brings the baby to the park and meets some mysterious children. But when she returns home with the baby, she discovers there has been a terrible mistake.

Rebecca and her neighbor, Mr. Rossi, seem to be having bad luck. When Mr. Rossi sprains his wrist, Rebecca takes over the care and feeding of his pigeons—and discovers a strange black pigeon with an eerie message warning Mr. Rossi of danger. Where did the pigeon come from, and what sort of danger is lurking? Is Rebecca herself now in danger as well? Only a visit to a fortune teller will reveal the truth!

Rebecca and Ana are spending spring vacation volunteering at a Japanese garden in Brooklyn. Rebecca is enchanted by the lush landscape of ferns and waterfalls, the exotic orchids, and the gardener's beautiful wife. Yet everything Rebecca does there turns out wrong. Someone seems determined to damage the garden—and to cast suspicion on her and Ana. Can Rebecca find the real culprit before the girls are banished from the garden for good?

Rebecca and Ana take jobs at a Broadway theater, where Rebecca hopes to use her acting skills. She's thrilled to meet Ollie, a beautiful actress working at the theater across the street. But when a series of mysterious accidents befall the young starlet, Rebecca begins to wonder whether someone is trying to keep Ollie off the stage. Can Rebecca find the culprit before Ollie breaks a leg—or worse?