All the answers /
Kate Messner.
- 248 p. : ill ; 22 cm.
Booklist, December 2014. Kirkus Review, November 2014.
Twelve-year-old Ava finds an old pencil in her family's junk drawer and discovers, during a math test, that it will answer factual questions, so she and her best friend Sophie have a great time--and Ava grows in self-confidence--until the pencil reveals a truth about her family that Ava would rather not know.