Actually, the appeal of this is not limited to one age group. Some boys under fifteen would find it fascinating reading; some men well beyond juvenile classification. The special agent who played so great a part in ferreting out the Nazi spy ring tells the steps by which a G-man is made. His opening chapters set the picture -- stressing the stemming back to childhood training, habits and education. Then, step by step, the various facets of the schooling for the profession are described. Good vocational material, as well as factual background for adventure reading.