Lydia Adamson: A Cat with the Blues (USA 2000)

From the Publisher:
A routine job cat-sitting for a beautiful Russian Blue feline at the center of a custody battle between Sidney and Beatrice Woburn turns deadly for Alice Nestleton when she narrowly escapes death at the local supermarket, the building's doorman turns up dead, and her feline charge mysteriously vanishes.

Lydia Adamson: A Cat with the Blues. Signet, ISBN: 0451201965 (December, 2000), 204 p., $5.99.