Based in part upon some very effective travelling, interviewing and informal conversation, Mr. Barber's effort to discover just what makes the Canadians fretful or explosive when the subject of the United States comes up--or they bring it up--has led to a book that is both serious and entertaining. The trouble in part is our massive indifference and disregard, in part the Canadians' own difficulty in deciding just what constitutes Canadianism.