In her preface the author states she ""has sought to present a maximum of factual information (about unions) in a terse but readable form""... She has succeeded. Here the intelligent reader can find out the salient facts about unions, -- characteristics, rules, regulations, details of membership, finances, education programs, health insurance, labor magazines, etc. Brief sketch of historical background with emphasis on presenting that factual data essential to understanding today. This is an encyclopedia of such facts -- a clearcut picture of the working of the AFofD, the CIO, International Unions and Locals. Not a brief for unions -- but a brief about unions, and a good one. One cannot find a complete study of an individual union for the material is treated topically. But the allover picture is of American unionism, a constructive force in our social, industrial and economic life.