This is not the first book on Prohibition I read, but certainly it's the best so far.
It covers basically every possible aspect of Prohibition, from the way the movement started in the XIX century, to how it ended and why.
I like the first part particularly. It detailed the social, ethnic and even religious reasons why the idea of a legal prohibition of alcohol became acceptable in the United States. Many were against it from the beginning, because they thought a federal law should not regulate the personal life of citizens, but the majority finally had they way because of a tightly knotted array of reasons that spanned from social issues like actual abuse of alcohol, to (true or imagined) issues concerning race and immigrants (this part was new to me and particularly enlightening), to politics, religion and economics. I had never realised before how complex the situation was, but here it was detailed clearly, with a lot of documentation and a crisp style that made it easy to read.
The central part was the hardest for me. It goes into a lot of details about every conceivable aspect of Prohibition, from the sacramental wine, to bootlegging, to the involvement of politics and low enforcement. Some of this was already known to me, some was new, but - personally - I found it too detailed and too much of everything. There wasn't a focus, and it seemed to me as if the matter was all over the place. I did find the information interesting, but I think I'd absorbed it more easily and effectively if I'd had less of it, but more focused.
The last part was back on track. It detailed the reasons why Prohibition was finally repealed. There wasn't anything particularly new here (not as much as in the first part), but the narration followed a line, and it was easy to read and understand.
This is certainly a precious source of information for anyone interested in Prohibition in particular, and American history in general. It is well-informed and rich and generally well-written. It does focus on facts more than people and I think this is a weakness of the book. Some important protagonists of Prohibition are merely mentioned in short parts of chapters and I wouldn't even knew who they were had I not read other books on the matter. That is something to complain about, but for the rest, I found it invaluable.