Heenan & Cook Injury Accident Lawyers is a full-service personal injury law firm in Missoula, Montana, USA. Heenan & Cook Injury Accident Lawyers are real Montana lawyers with offices in Missoula and throughout Montana. represent and defend the rights of consumers and injury victims throughout the State of Montana, including Missoula, Billings, Bozeman, Whitefish, Great Falls, and other cities around the state. Heenan & Cook Injury Accident Lawyers specializes in several areas of personal injury law, including burn injuries, car accidents, head and brain injuries.