detective and mystery stories

Frank and Joe Hardy become involved in a large and dangerous conspiracy while trying to keep the valuable invention created by one of their father's clients from falling into the hands of thieves.

Problem children Jenna and Lucas find themselves invited to Camp Fielding, where they are surrounded by other misfits whose parents hope will be changed into prodigies. When strange things begin happening around them, Jenna and Lucas team up to investigate, but what they discover is beyond anything they could have imagined.

After violating his parole, seventeen-year-old, semi-literate Dylan Dawson drives from California to Texas to try to see his father on death row in an attempt to figure out how his own life has gone so terribly awry.

Junior sleuth Jeffrey Bones and his grandfather enjoy a day at the amusement park until their tickets to ride the giant roller coaster mysteriously disappear.

Eight-year-old Nancy Drew is thrilled to be invited to Deirdre's City Girls-themed sleepover party, but her investigative skills are needed when Deirdre's Hollywood Heather doll goes missing.

Martha the dog recounts her early days as a canine criminal after having been adopted by a thief and her partner before being captured by the police and brought to a shelter, where she ultimately met Helen.

Eric wants to find out about the old man who has moved in next door, so he and the other Cul-de-sac Kids decide to pay him a Christmas visit.

Leon and his friend Susan discover something suspicious going on in their tiny little village of New Auckland, and soon find themselves involved in an archeological mystery.

Sent to Camp Happy Harmony to learn how to get along with each other, pairs of brothers and sisters chronicle in letters home how they come to suspect the intentions of the singing family running the camp.

Twins Jen and Zeke investigate when a circus arrives in their town of Mystic, Maine, and its tiger is stolen. Includes clues for readers who want to try to solve the mystery.