Katja Hoyer is a German-British historian and journalist. She is a Visiting Research Fellow at King's College London and a Fellow of the Royal Historical Society. Her debut book Blood and Iron was well received by academics and critics. Her second book Beyond the Wall was a Sunday Times bestseller and long-listed for the prestigious Baillie Gifford Prize. Her next book Weimar will be published on 7 May 2026 by Allen Lane.

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Katja is currently a columnist for the Berliner Zeitung. She is a regular contributor to Bloomberg, The Spectator, The Daily Telegraph and UnHerd and has also worked as a columnist for The Washington Post. She occasionally writes for a range of other newspapers such as The Financial Times, The Times, The Guardian and Die Welt on current political affairs in Germany and Europe as well as history and books. 

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Katja is an accomplished speaker and has contributed to TV productions for Sky History, ITV and international broadcasters in on- and off-screen roles. She has advised public and private institutions on topical issues in Germany. Katja was born in Germany and now lives in the UK.