The Whiskeys of Ireland by Peter Mulryan would not be a bad place to start. Very concise and still fairly up to date.
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HEREProduct Description
The History of Irish Whiskey
There is a direct correlation between the history of distilling in Ireland and the history of the island itself. It's as if whiskey were the lifeblood of the people.
The Rise and Fall
Did you know that a hundred years ago Irish Whiskey was so prized, that Scottish distillers often shipped their whiskey to Dublin? Here it was mixed with minute quantities of Irish, re-exported as 'Irish Whiskey and sold at a premium!
The Fall and Rise
The Irish distillers reacted to the threat of blended Scotch in just the way you would imagine; they fought amongst themselves to the edge of extinction ... but ... today Irish Whiskey is the fastest-growing brand in the world. This year alone seven new brands were launched internationally.
How Whiskey is Made
Understand the difference between Single Malts, Blends, Pot-still whiskeys; and the art of distilling and blending.
Tasting Whiskey
How to explore the different flavours found in Irish Whiskey and where they come from. Learn how to taste as well as drink!
This beautifully produced book, with full-colour photographs throughout, will tell you everything you ever wanted to know about Irish whiskey.