I just finished reading "The Odessa File" again.

One of the most believable books written and with a good plot as well. No super heroes or unbelievable death-defying actions.

A young German freelance writer read the diary of a WWII concentration camp survivor and finds the motivation to find a concentration camp SS officer.

There are only two factual mistakes. The author equates men with lower SS serial numbers to senior rank over those with higher numbers; and he confuses the motto on the SS daggers with that of the Hitler youth. That is little when compared with much of the fiction churned out.

Anyway, a good read and cheap on Amazon/eBay.

Dave