Just what qualities go into the production of a fine biography are difficult to define. If one examines, however, such eminent examples of biographic writing as Boswell's Johnson, Southey's Nelson, Lockhart's Scott, Trevelyan's Macaulay and, in more recent times, Harvey Cushing's Life of Sir William Osler, one finds in all a simple direct style, a vivid description of character and an illuminating anecdote which brings the story to life. All these qualifications are present in Glasser's admirable little biography of Roentgen. One's interest is held from the first line, and there is a happy blending of the story of a great man's scientific achievements with his personal life and character. The selection of illustrations is to the point, and the whole volume is prepared in the usual attractive style of Thomas' books.