If you like humorous and mystery stories

If you enjoy both humorous and mystery books, here are some recommendations:

Beanpole / by Barbara Park.
Thirteen-year-old Lillian, miserable about being a "beanpole" and a
loser, stops feeling sorry for herself when she learns the difference
between a loser and a winner.

The dark stairs : a Herculeah Jones mystery / by Betsy Byars.
The intrepid Herculeah Jones helps her mother, a private investigator, solve a puzzling and frightening case.

Hey, new kid! / by Betsy Duffey
Third-grader Jeremy dreads going to a new school when his family moves, so he decides to reinvent himself, hoping his new classmates will be impressed.

Sammy Keyes and the hotel thief / by Wendelin Van Draanen
Thirteen-year-old Sammy's penchant for speaking her mind gets her in
trouble when she involves herself in the investigation of a robbery at the "seedy" hotel across the street from the seniors' building where she is living with her grandmother.

The secret knowledge of grown-ups / revealed and illustrated by David Wisniewski
A humorous revelation of the real reasons why adults tell children to do things, such as "Eat your vegetables," "Comb your hair," and "Don't blow bubbles in your milk."