In reading order
Detective Gretel
P.J. Brackston
Once Upon a Crime
P.J. Brackston
Gretel and the Case of the Missing Frog Prints
P.J. Brackston
The Case of the Fickle Mermaid
P.J. Brackston
The Sorcerer's Appendix
P.J. Brackston
Once Upon a Crime
P.J. Brackston
Gretel and the Case of the Missing Frog Prints
P.J. Brackston
The Case of the Fickle Mermaid
P.J. Brackston