To Love and Be Wise

To Love and Be Wise - Josephine Tey, Robert Barnard The fourth of the Alan Grant books (if you count the Franchise Affair, which admittedly is only tangentially an Alan Grant book), this is the first one to finish with the case actually being -solved- rather than ending with a deus ex machina with the solution falling in their laps (or the guilty giving themselves up.)

As well as this, the story itself is quite enjoyable, reasonably consistent and believable, and a nice cozy mystery.