The Novel Habits of Happiness — Alexander McCall Smith

Isabel Dalhousie, the insatiably curious Edinburgh sleuth and philosopher, takes on a case unlike any she's had before: a six-year-old boy has been experiencing vivid recollections of a past life. His visions include a perfect description of a Scottish island and a house where he claims to have lived. The boy's mother asks Isabel to investigate, but her findings continue to perplex as her efforts to seek rational explanations are thwarted by the unusual mystery unfolding before her.

Isabel is presented with further challenges as she begins to prepare an important issue of the Review of Applied Ethics. Two visiting academics, Lettuce and Dove, arrive in Edinburgh with plans that may upset the harmonious balance of her life. These trials will require all of Isabel's wit and understanding -- but happily, in her blissful home life with her husband and young son by her side, Isabel is always reminded of her blessings.