The UK's largest book retailer has selected Hanns and Rudolf as their non-fiction book of the month for May.
Shortlisted for the Costa Biography Award Hanns and Rudolf tells the story of two German men whose lives crossed in an shocking way.
Hanns, the son of a prosperous family, fled Berlin in the 1930s for London. Rudolf, farmer and soldier, became the Kommandant of Auschwitz Concentration Camp. After the Second World War a British War Crimes Investigation is assembled to hunt down senior Nazi officials. Hanns is lead investigator, his most elusive target, Rudolf.
I also wrote a blog for the Waterstones website