Sarah Logan is a spinoff from the Tom Walker mystery series. John Calthrop, the investment adviser and general counselor, hooks her into his world as she is confronted by two rapists and potential murderers who she takes out expeditiously. The rest of the story goes from there, as she disposes of the bodies, deals with the fall out, and winds up doing some very cool stuff. Great new mystery series, especially for those who appreciate Patricia Highsmith style and strong female protagonists.