David Adler

When Andy and his friend Tamika travel to the city for a weekend with Tamika's aunt, they arrive in time to rescue hamsters parachuting down from Aunt Mandy's building! Andy resolves to uncover who's behind the troublesome incident, but first he must endure trips to fancy restaurants, museums and the ballet, made more unpleasant by annoying Jason, a young friend of Aunt Mandy's. The big-city fun he was expecting turns into some surprising discoveries...

Boy, does Andy have troubles! His gerbils escaped and are scampering all over the basement. He's late for school and he sure doesn't want to give that boring Ms. Roman another excuse to call his parents. And he planned to ask his parents today if his good friend Tamika could live with his family until her parents fully recover from a terrible accident. It is definitely not a good day for gerbil troubles. And when Andy learns that his mother is pregnant,...

On Green Day, Cam and her classmates discuss ways to protect the environment, but when money collected for the school's new skylights disappears, Cam uses her photographic memory to solve the mystery

Cam Jansen and her friend Eric are spending the day at the amusement park. They take Cam's aunt and uncle with them through the scary haunted house. Plastic skeletons hang from the ceiling. A large black form jumps out of the shadows of a dark room. Everyone has a wonderful time until they get hungry and thirsty. When Cam's aunt tries to pay for some snacks, she discovers her wallet is no longer in her purse. Will Cam be able to solve the mystery...

Cam and her friend Danny help solve the mystery of a stolen pearl necklace when the governor comes to visit their school for the dedication of the new library

While visiting Aunt Molly at a fancy downtown hotel, Cam uses her photographic memory to help one of the guests find her stolen luggage and pet cat, and to catch the thief

When she notices some bones missing from a dinosaur skeleton exhibited in the museum, a young girl with a photographic memory tries to discover who has been taking them and why

Cam Jansen battles a famous children's mystery writer to see who can solve the case of the stolen car

While Cam's Aunt Molly is competing in a comedy contest, the expensive plate the winner will receive disappears and Cam and Eric set out to find it before the contest's over.

Cam Jansen and her photographic memory help her friend's grandfather retrieve his missing bag with an important graduation gift in it