The Careful Use of Compliments.
(Book)

In addition to being the nosiest and most sypathetic philosopher you are likely to meet, Isabel is now a mother. Charlies, her newborn son, presents her with a myriad wonders of a new life, and doting father Jamie presents her with an intriguing proposal: marriage. In the midst of all this, she receives a disturbing letter announcing that she has been ousted as editor of the Review of Applied Ethics by the ambitious Professor Dove. None of these things, however, in any way diminshes Isabel's curiosity. And when she attends an art auction, she finds an irresistable puzzle: two paintings attributed to a now-deceased artist appear on the market at the same time, and both of them exhibit some unusual characteristics. Are these paintings forgeries? This proves to be sufficient fodder for Isabel's inquisitiveness. So she begins an investigation... and soon finds herself diverging from her philosophical musings about fatherhood onto a path that leads her into the mysteries of the art world and the soul of an artist.