Kenneth Wishnia 
Red House [PDF ebook] 

First she was a beat cop, then she was unemployed. Now, Kenneth Wishnia’s dynamic Filomena Buscarsela has apprenticed herself to a New York City P.I. firm. Trouble is, she often agrees to take on sticky neighbourhood cases pro bono rather than handle the big-bucks clients her bosses would prefer. When she witnesses a marijuana-possession arrest that nearly turns into a shoot-out with the police, Fil is roped into finding out what went wrong. Trying to balance charity cases like these with bread-and-butter cases, not to mention single motherhood, Fil is quickly in over her head.