I finished three books this week. The best of the bunch was Georgette Heyer's Why Shoot a Butler? which was great fun. Frank Amberly has a little bit of Lord Peter Wimsey in him. Or vice versa. Amberly smugly and unerringly solves the mysterious shooting of a seemingly innocuous butler in 1930s England.
I've been obsessed with historical fiction set in Europe between the wars, and this fit the bill neatly. It's also a well told story, although if you like to solve the mystery along with the sleuth(s), you will be disappointed. Amberly is very Sherlockian, in that he keeps much of the solution close until the big reveal where he flouts his brilliance.