I've just read 'The Ratline - Love, lies and justice on the trail of a Nazi fugitive' by Philippe Sands.
It's a true story about an Austrian Nazi who oversaw the creation of Jewish ghettos and deportations, and his life on the run after the end of the war, but reads like a thriller. I highly recommend this book, particularly if you're interested in WWII books.
I started Normal People by Sally Rooney this week and am watching the TV series at about the same pace that I'm reading the novel.
I'll give Travellers in the Third Reich a read next - thanks for the tip; also like the sound of Empireland.