This volume of the IARC Monographs presents evaluations of the carcinogenic hazard to humans of drinking coffee and very hot beverages including, but not limited to, mate. An IARC Monographs Working Group reviewed epidemiological evidence, animal bioassays and co-carcinogenicity studies, and mechanistic and other relevant data to reach conclusions as to the carcinogenic hazard to humans of drinking coffee, mate, and very hot beverages. The Working Group assessed more than 1000 observational and experimental studies that investigated the association between cancer at more than 20 sites with drinking coffee, mate, and very hot beverages.