Book review: A definitive account of the Irish fighting in the Spanish Civil War

The authors of In Spanish Trenches: The Mind and Deeds of the Irish Who Fought for the Republic in the Spanish Civil War dedicate much attention to ex-IRA man Frank Ryan

Ex-IRA man Frank Ryan, left, and John Robinson during the Spanish Civil War . The authors dedicate much attention to Ryan.

Limerickman Frank Ryan and Londoner George Nathan were unlikely friends.

Ryan was an IRA veteran.