Orange January (longlist 2005)
Actually the first of the Jackson Brodie mysteries (One Good Turn, When Will There Be Good News?) but the third I've read. All have been easy to read, great mysteries, lots of characters who don't appear related, but Atkinson ties them up nicely in the end. Case Histories provides the background to Jackson Brodie that I was missing from the other books, but I don't remember feeling confused without this information - Brodie is just more layered.
Three old mysteries are first explained, (like a Cold Case episode; I loved that show) and then they are introduced as clients of Jackson Brodie. Brodie does some investigating and gets more caught up in his clients' lives than he would want. Except he does, because he's a very caring guy. Just a really well done mystery with good characters, good plots, and easy reading style.
