This book starts as a mystery and evolves into psychological thriller. It is set in England, post WWI and reminds me of watching a BBC mystery series. It just grows in intensity and for the last half of the book I couldn't put it down. Penguin publishes it...it has won or placed in several mystery awards. The author is from So. Africa and has just started writing this 3-part series, this book is the first, a 2nd has been published and he is working on the 3rd. I hope they bring it to BBC.