A perfectly good book, but suited to relative beginners to the field of copywriting - people who have a few ideas, and a little experience, but need inspiration. If you've never written copy before, this may be slightly over your head. If you're very experienced and want to take your copywriting to the next level, it won't help much.
For sort-of newbies: need a hand crafting your third or fourth sales letter for your small business? Need to write new text for your own website, improving on the words you wrote a few years ago? This will prove useful. It's sensible and straightforward.
For pros: there's not much in the way of new ideas or source material to draw from, that you won't have come across already in your work. (If you don't know these concepts, shame on you!) The ideas are simple (by our standards). The detail is low (ditto). Certainly, it's not the copywriters' equivalent of the numerous graphic design or web design sourcebooks that our colleagues in related fields can turn to. I was hoping for that, but my bad. Best to simply keep a clippings file in your drawer or on your computer.
If you're a small business owner and want some bright promotional or communications ideas, I'd recommend you first turn to handy work like '101 Ways to Promote Yourself' or '101 Ways To Write Dynamic Media Releases' by Raleigh R. Pinskey. (I don't work for her or earn money from her work - her books were invaluable for me when I started copywriting.) Also, there are many free copywriting templates on the web, that are useful for beginners. (Sorry, Amazon!) Beginners can learn a lot without spending anything.