A well-written, easy to read book covering all the main points regarding the background, causes, and events during World War 2.
Has a much broader scope than other, more detailed books on the war. This book gives good descriptions of the resentment Germany felt at their treatment at the end of World War 1 (and with fair-enough reason) and the economic turmoil of the Depression. This created conditions for the rise of the dictators in the Axis countries.
Good descriptions of the international and national politics and how this subsequently influenced the battles - often giving the "why" behind the conflict.
Especially good descriptions of Hitler's racial policies, which was the reason for his invading the Soviet Union and Eastern European countries. He wanted living space (lebensraum) for his Aryan race.
Also good descriptions of the home fronts for Britain, the United States, USSR, Italy, Japan, and Germany. This gave a good idea of what it was like for civilians to live through that period.
I liked how the author included the Japanese invasion of China in 1931 (Manchuria) and 1937. Many Western books tend to leave that out, starting with Hitler's invasion of Poland. Effectively, World War 2 started in 1937 for China and Japan.
I also liked that it wasn't heavily slanted towards the United States perspective. This is a good achievement by the author since he's from the United States.
Most of the combat is written about in highly summarised form. This is still adequate, though. There's good linkage between the individual battles and the broad picture of what the combatants were trying to achieve (i.e. their strategy).
The only complaint I had about the book was its descriptions of what happened in China after the Western countries entered the war against Japan. Made it feel as though the Chinese basically stopped fighting the Japanese after everyone else had joined in. I'm sure that's not the full story, otherwise why did many millions of Chinese die in World War 2? According to the book, somewhere between 15 and 22 million. In numbers of deaths per country, that's the second most numerous, behind the Soviet Union (25 million).
Overall, a very good book. Gives very wide coverage over a broad range of topics, sometimes better than other one-volume books (which focus mainly on the combat). Written in simple to understand language, typical of other Dummies books.