New York City's Finest by Cora Buhlert

Jo Grayson had a dark past. Ex con-artist, ex-junkie, complete and utter screw-up. However, she left all that behind her when she became pregnant. And now, six months later, Jo has a dingy one-room apartment and a crappy but steady job as a cab driver. Things are looking up.
But then one day, her past catches up with Jo in the form of a mysterious stranger getting into her cab. The stranger is Detective Ray McCormick, a cop on a mission to hunt down the criminal mastermind known only as the Kraken. McCormick wants information, information only Jo can provide, for Jo used to work for the Kraken and is one of the few people ever to walk out on him and live to tell the tale.
Jo is as eager as anyone to see the Kraken go down. But helping McCormick could put both Jo's life and that of her unborn child at risk.

This is a novelette of 12000 words or approx. 35 print pages.