Book excerpt: Wigmore on Alcohol is an indispensable tool for medical and legal practitioners looking for up-to-date scientific evidence related to blood alcohol. The author, James G. Wigmore, is a forensic alcohol toxicologist who has testified in over 600 criminal trials at all levels of court, including the Supreme Court of Canada, as well as in civil and coroner cases, and has published more than 50 articles in the field of forensic alcohol toxicology.