Criminal lawyer and all-time #1 mystery author Erle Stanley Gardner wrote close to 150 novels that have sold 300 million copies worldwide. His most popular books starred the incomparable attorney-sleuth Perry Mason.
The Case of the Sulky Girl:
An impetuous niece who demands her trust fund be released comes to Perry Mason for help. But it's her boyfriend who needs defending when he is charged with murdering her controlling uncle.