Just finished this book and have to say it is brilliantly researched and really well written.
Amazon.co.uk User Recommendation
I was concerned it would be too dark for summer reading but it doesn't dwell on the holocaust although of course it is covered. It is focussed on how easy it was for the high ranking Nazis to escape and start new lives, and more disturbingly how Eichmann had no remorse whatsoever in the "Final Solution" to rid Europe of Jews. The main area is how Simon Weisenthall and Mossad found him (which wasn't easy) and more importantly managed to get him out of Argentina to face justice.
Highly recommended and a subject matter that shouldn't be allowed to be lost in the mists of time.