#35, The Trespasser, by Tana French

Tana French writes fascinating books, and this may be he best yet. She sticks with the Dublin Murder Squad, but has resisted the urge to turn this in to a series with one main character with a predictable supporting cast. Her knack is in unfolding the inner workings of her protagonist's mind at the same time she pushes the plot forward. The result is highly satisfying mysteries with a depth of characterization that is rare in the genre. Highly recommended.