First - and this is the weaker argument - I dispute that the word "drug" is well-defined in contemporary English. For example, in Ocean City, MD, there is lite

First - and this is the weaker argument - I dispute that the word "drug" is well-defined in contemporary English. For example, in Ocean City, MD, there is literally a drug store which is demarked by a huge - I mean huge - sign that says, in all caps, "DRUGS." Which makes some sense because it's, well, a drug store. But then, as you get closer, you can see that, in smaller letters above "DRUGS", it also says, "Ocean City says No To" - literally two apparently conflicting definitions of the word on a single sign. And I don't think this is even slightly uncommon. Second, and more importantly, by putting LSD and heroin in the same category, the author comes up with a genre of writing he calls "drug books," which appear to me - if the author's reading of the book being reviewed is even accurate - too little in common to be useful.