D.George Boyce & Alan O’Day 
Defenders of the Union [PDF ebook] 
A Survey of British and Irish Unionism Since 1801

Defenders of the Union is a concise and readable overview of the history and contentious politics of Unionism and the affect it has had on Anglo-Irish relations over the last two hundred years. It is an essential guide to this confusing topic and covers key areas such as:* definition of unionism* establishment of the union* Unionist literature* loyalists since 1972.