Lydia Adamson: A Cat on the Bus (USA 2002)

From the Publisher:
When an ordinary ride aboard a crosstown bus leaves Alice Nestleton an eyewitness to a bizarre and senseless multiple homicide, by a killer who leaves her cat behind, the actress, cat sitter, and amateur sleuth is asked to assist the NYPD as a consultant on the case.

Lydia Adamson: A Cat on the Bus. Signet, ISBN: 0451207599 (December, 2002), 208 p., $5.99.