A collection of the talks presented at the 2nd International Brewers Symposium on Hop Flavor and Aroma in Beer held in Corvallis, Oregon from July 25-28, 2017. Includes question and answer sessions following the talks as well as commentary by the moderator, Dr. Thomas H. Shellhammer. The talks are highly technical in nature and presented with the assumption that the target audience is well informed and familiar with the topics. Published by the American Society of Brewing Chemists (ASBC) and Master Brewers Association of the Americas (MBAA).