Delving more deeply into P.I. Kinsey Millhone's past that any of Grafton's previous 14 novels, ""O" Is for Outlaw" finds Kinsey dealing with a man who has purchased the contents of a defaulted storage unit--for 30 bucks, he'll sell her the lot. A letter she finds amid childhood memorabilia forces her to reexamine her beliefs about the breakup of her first marriage--and about an old unsolved murder.