Harry is upset about losing his library card three times in a row, but feels better when he learns that his father and his friend Dorcas sometimes lose things.
As Christmas approaches, a young boy and his talking dog, that only he can hear, try their best to find a replacement for the special medallion that his mother lost long ago.
from the tattered casebook of Chet Gecko, private eye
Hale, Bruce
2000
When hired by a fellow fourth-grader to find her missing brother, Chet Gecko uncovers a plot involving a Gila monster's revenge upon the school football team.
Buddy has never given up hope of finding his beloved human Kayla, so when he sees people taking things out of Kayla's old house and loading them in a van, he makes a daring decision, hoping to be reunited with his family.
Buddy relies on his canine detective skills and the help of his new family to make sure two dogs, Muffin and Jazzy, find their way back to their real owners.
When someone takes a pet goldfish, then other items from Ms. Herschel's classroom, each time leaving a clue in the form of a poem, student Edgar Allan competes with a classmate to be first to solve the mystery.