Hot Six by Janet Evanovich

Low-rent bounty hunter Stephanie Plum reaches depths of personal experience that other women detectives never quite do. In Hot Six, for example, a sequence of new and hideous cars bite the dust; she finds herself lumbered with a policeman's multiply incontinent dog; and she has several bad skin days. All this when she is trying to prove her distinctly more competent colleague and occasional boyfriend Ranger innocent of a mob hit; avoid the heavies trailing her in the hope of finding him; and cope with a wife-abusing bail defaulter with nasty habits, such as setting Stephanie on fire.