When Cam's grandparents are robbed on their way to her parents' surprise birthday party, Cam uses her photographic memory to solve the mystery.

On her first day of fifth grade, Cam Jansen uses her photographic memory to help the police find a car thief. Includes a memory game.

Frank and Joe Hardy search a mysterious castle for clues to a stolen, extremely valuable comic book.

Billy Dickens discovers that his mysterious father lives in Montana, so this summer Billy will fly across the country, hike a mountain, float a river, dodge a grizzly bear, shoot down a spy drone, and save his own father.

Eleven-year-old Millie and five other girls, snowed in at Amelia Earhart Birthplace Museum in Atchison, Kansas, are on a scavenger hunt when the lights go out and Amelia's aviator goggles go missing.

Middle-schoolers Marcus, Theo, and Lu return to the Library to help figure out, and fix, what is going wrong at a school in Massachusetts.

Luthor, a former attack dog, is supposed to be on his best behavior now that he's in the care of Savannah, a girl who's easily a dog's best friend. But every time a certain truck passes by Savannah's house, Luthor goes into attack mode -- and chaos follows. Meanwhile, Griffin Bing is locked in the fight of his life with his archenemy, Darren Vader. Both are trying to win an invention contest -- and will stop at nothing to be victorious.

Nancy investigates her father's disappearance in Washington, D.C. in the twenty-second book of the Nancy Drew Diaries.

When Nadine's Candy Kingdom amusement park wrist band goes missing, eight-year-old Nancy Drew and her friends investigate the mystery.

Nancy and her Clue Crew must help Katie, who hopes to beat the world record for the Dance-A-Thon arcade game, find her lucky headband before she competes.