Railway Guns of World War II, Steven J. Zaloga.

Railway Guns of World War II, Steven J. Zaloga. 
Although the heyday of the railway gun came during the First World War, the most famous example of the type, the massive German 80cm K(E) guns 'Dora' and 'Gustav', came from the Second World War. In reality these were useless vanity projects, but as this book makes clear every major combatant used a least a handful of railway guns during the Second World War. This book combines  brief technical descriptions of each country's railway guns with a look at their combat service
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