Designing Great Beers by Ray Daniels is a (very) through guide to the components of beer, current and historical styles of beer, and in-depth investigations of how those styles are made both commercially and at home. If you want to create beers in a few particular styles, this is the reference you need.
However, this is not a “how to”. There is excellent information on how to figure out how much malt you need, or how much yeast, or how to “fix” your water. But the instructions use beer-making jargon that the beginner (and perhaps even the intermediate) brewer will not understand. For example, it may be interesting to know that one style used a “triple decoction” in the mid 1800’s. But if you don’t know what a decoction mash is, as opposed to an infusion mash, that doesn’t help.
One thing I would love to see in a book like this is an “I screwed up” section. There is a passage on things you can do if your final specific gravity misses your target (if you don’t know what that means, this is not the book for you). But I’d love something like “what will my beer taste like if I use too little yeast, or boil at too high a temperature, ...”. I just finished a batch of classic British Ale using an all grain mash bill, the first I’ve tried. But I did the mash at much too high a temperature, and had far too small a final gravity. The beer had a sour taste that I wouldn’t have expected, and it was thin. But it wasn’t bad! That’s the sort of “what if” information that I’d love to have. I’m not sure that sort of thing would be what the author was trying to get at with this book. But it surely would be nice.
The best use of this book is as a reference for home brewers who want to try making beers “like” particular styles, that is for those who want to experiment. This is also a great book for home brewers who get into competitive beer making (yes, that’s a thing). For beginners, though, I’d stick with “The Complete Joy of Home Brewing” by Papazian, and probably buy some of the excellent kits that are available from various sources.
In short, this is an excellent book for what it does. But don’t expect it to teach you how to make beer. Just how to design it!