The Last Days of Budapest : Spies, Nazis, Rescuers and Resistance 1940-1945, published in the United Kingdom in January 2025, to be published in the United States in April 2025. The first English-language account of the Hungarian capital during the Second World War.
Tower of Basel: the Shadowy History of the Secret Bank that Runs the World, 2013, to be published in an updated edition in autumn 2025. The first investigative history of the
Bank for International Settlements, the bank for central banks. ''Hitler's Secret Bankers: How Switzerland Profited from Nazi Genocide,'' first published in 1997, updated edition with new material published in 2020. An investigative history of Switzerland's wartime economic links with
Nazi Germany.
City of Oranges: An Intimate History of Arabs and Jews in Jaffa, first published in 2006, updated edition published in 2018. An account of Israel and Palestine from 1920 to the present day, told through the lives of Arab and Jewish families in Jaffa. ''The Believers: How America fell for Bernard Madoff's $65 billion Investment Scam'', 2009. An exploration of the psychological roots of the
Bernie Madoff pyramid scheme and why so many people invested in it.
Complicity with Evil: the United Nations in the Age of Modern Genocide, 2006. An investigative history of the UN's failure to prevent genocide in Bosnia, Rwanda and Darfur.
Milosevic: A Biography, 2002. The first full-length account of the life of the former Serbian leader.
Seduced by Hitler: Choice, Corruption and Compromise in the Third Reich (co-authored with
Roger Boyes), 2001. An exploration of the ethical choices and compromises of life and death in Nazi Germany.
A Heart Turned East: Among the Muslims of Europe and America, 1997. A journey through the lives and communities of Muslim migrants in the west. ==Thrillers==