Among the Mad by Jacqueline Winspear, from Winspear's popular Maisie Dobbs series. I have mixed feelings about this series. Some of the books I've enjoyed. Others, not so much. Nevertheless, I always check into each new book from Winspear.
Promises in Death by J.D. Robb. As of today, I'm on page 25 of Robb's book Salvation in Death
The Bellini Card by Jason Goodwin. Last year I enjoyed reading Goodwin's The Janissary Tree: A Novel
The Empty Mirror by J. Sydney Jones, a murder mystery set in 1898 Vienna. This book received a nice review from the Washington Post.