This is a rather disappointing book from DK publishing. It's divided up into 4 sections: key players, military personnel, key events, and technology. The sections on military personnel and technology are a waste as far as I'm concerned. 20 pages of information on the military uniforms and gear worn by soldiers from the different countries. 50 pages on the tanks, aircraft, watercraft, artillery and weapons from the different countries. The section on key players is ok, but each person gets one page. There's just as much information about Adolf Hitler as there is about one of his generals. In my opinion this is way out of proportion.
The best section is the key events and battles, but even it's problematic. The amount of information is so limited that it doesn't satisfy. Most of each page is taken up by a photograph, not information. Incidentally, there is very little about the Holocaust in this book. The organizational method worked better for me in this section because it's divided into the three main war regions: Hitler and Europe, Mussolini and the Mediterranean, Hirohito and Japan. There's a page for each of the major battles. It's like three "mini" wars were going on at the same time, all with dictators trying to divide and conquer.
Final analysis is that this could have been much better, but it's still useful as a basic reference source. Large photographs dominate every page, the page layout is consistent, and the word count is low, so it's especially good for struggling readers. Every library should own a copy.