After the last book I read, I needed a light and fluffy story to read, and this was just the ticket.  Enjoyable story and a well paced plot with a few twists and turns. 
 
Kathleen once again finds herself at the center of a mystery when she finds the body of Margo, the curator brought in to stage an art exhibit at the library and the star exhibit - a valuable sketch - turns up missing.  Can Kathleen and her supernatural cats solve the crime?
 
The antics of Owen and Hercules were a bit more subtle in this book; I'll liken it to how Koko "helps" solve the mystery in The Cat Who series.  Nothing overt, just nudges in the right direction.  Kinda clever.
 
Overall, an good, quick read.