If you like solving mysteries, you may like these books:
Cam Jansen and the Mystery of the Babe Ruth Baseball by David A. Adler
Cam uses her photographic memory to identify the person who stole a valuable autographed baseball.
Chasing Vermeer by Blue Balliett.
When seemingly unrelated and strange events start to happen and a precious Vermeer painting disappears, eleven-year-olds Petra and Calder combine their talents to solve an international art scandal.
The Dark Stairs, A Herculeah Jones Mystery by Betsy Byars
Herculeah and her side-kick, Meat, attempt to solve the mysterious disappearance of the owner of Dead Oaks, an estate with a history of murder and insanity.
Encyclopedia Brown: Boy Detective by Donald J. Sobol
Encyclopedia Brown has a nose for a mystery and the reader gets to help him solve his latest case.
From the Mixed-Up Files of Mrs. Basil E. Frankweiler, written and illustrated by E. L. Konigsburg.
Claudia and Jamie run away from home and wind up living at the Metropolitan Museum of Art. There they are
privy to the introduction of a new statue and immediately are suspicious of its authenticity.
The Night Flyers by Elizabeth McDavid Jones
In 1918, caring for her family's homing pigeons while her father is away fighting in World War I, twelve-year-old Pam comes to suspect that a mysterious stranger in her small North Carolina town is a German spy. Part of the History Mysteries series.
Sammy Keyes and the Hotel Thief (a series!) by Wendelin Van Draanen
The day before starting seventh grade, Sammy peers through her grandmother's binoculars and spots the latest in a rash of burglaries. The burglar spots her right back!
The Secret of the Mansion by Julie Campbell
Thirteen-year-old Trixie Belden and her friends search for hidden treasure in a mysterious mansion owned by an old miser.
The Strange Case of Baby H by Kathryn Reiss
In the aftermath of the 1906 San Francisco earthquake, 12-year-old Clara finds a baby on the family's doorstep.
Part of the History Mysteries series