Hop Variety Handbook. 2016 Edition. A book put together by Yakima Chief - Hopunion LLC. This book covers the history of YCH Hops, the stories of their hop growers, the history of hops & what they are, as well as hop breeding. And finally, this book includes a complete list of the YCH Hop products including hop blends. A full page is dedicated to each hop which covers in detail its purpose, history & origin, flavor & aroma profiles, beer styles best suited for use, brewing values, and total oil breakdown.