Edit: I found this blog post that lists some alternatives http://thewritingresource.net/2011/09/22/forget-everything-s...
About half of the titles are punny or plays on words, which I'm somewhat suspicious of (even though I like puns). And, all are at least twice the size of Strunk and White. I understand that some subjects are bigger than a ~100 page book can cover, but despite having spent a lot of my life writing (and having published a book), I've never been able to plod through a big grammar book. I can read Elements of Style in an afternoon without feeling like it's a chore. As noted in some of the reviews, if it's wrong it's not worth even that much effort. But, I never thought it was predominantly wrong or predominantly misleading. And, it usually reminds me about one or more of my negative writing habits, and I correct it for a while until I forget again.
The Elements of Style was fine for me as a first peek into the subject in junior high; it's just as a kind of bible that it's overrated.
I've (tried to) read many bigger books about style, usage, and grammar, of course, but I really would like a book I can plow through just before I sit down to write something large. Like, the day before NaNoWriMo starts, or before I embark on an editing pass of my company's documentation, just read it all in one sitting as a refresher on how to write clearly and effectively. I've always used Strunk and White for this purpose. I don't want to be a grammar scholar, I just want to write better and more clearly, and I think a lot of folks are in that position; which likely explains the enduring popularity of Strunk and White, despite its critics.