Ellery Queen Jr.10 books in series
The Black Dog Mystery Publisher's Summary
When there's a bank robbery in the country village where Djuna lives, and one of his dog's best friends gets shot in the escape, the boy makes up his mind he'll find out who did it. His chum and his dog, Champ, are in on the hunt, and two heads and a keen nose are better than one. The boys remember something queer they noticed about a truck with a covered load that passed them on the road when they were going fishing. Clue follows clue, and when the Scottie gets himself all smeared with fresh paint and Clarabelle spoils a picture, Djuna emerges as a regular Ellery Queen!