You might want to have a look at Travellers in the Third Reich and Hitler's People also. The former i have read and thought excellent, the latter is in the current 'to be read' pile.
I'm making a conscious effort to read more this year and so far so good (although maybe not in terms of variety, another crime book finished and I've started another since)
King of Ashes by SA Cosby, a successful finance wiz returns to his home town when his father has a car accident only to find that it was no accident and is linked to his brother getting involved with some wrong'uns, delves into their family history and his plan to get them all out of trouble. Absolutely unhinged villains, main character wrestling with their morals, little twists without being overly twisty. Listened to this one and the narrator is fantastic too, he's also narrated Cosby's previous books so there's more added to my list.