There are a number of recommended books listed here:

http://typophile.com/books

Elam’s book on grid systems is excellent, but not worth much on it’s own as it explores how objects function within grids without really explaining the geometry that goes into really building good grids in the first place. The Rabinowitz book is a textbook in a traditional sense. It is a long survey of typography covering everything from font history to page layout to font design. All of the text is very dumbed-down, but I find that to be the strong point of the book, because it has none of the excesses and pretense that clutter up most of the books in this category, particularly those easily purchased in the United States. The downside is that, being a mass-market textbook, the design is just plain ugly and a segue of some sort is randomly assorted into every chapter. It also wastes a tremendous amount of space on specimens of the same common typefaces that get shown in one typography book after another.

The two books would actually make a pretty good pair.

The Complete Manual of Typography by James Felici is an excellent one-book reference. Recommended by Erik Spiekermann and Matthew Carter. And me (which doesn’t mean much, but don’t hurt my feelings by pointing this out).

Adobe Press. ISBN 0-321-12730-7

It is my one exception (do you always have to have one exception?) to my general rule of never buying a book whose title includes any of the following words:

1. complete
2. ultimate
3. essential
4. idiot’s
5. moron
6. simple
7. easy
8. best
9. every thing you need to know

Logo Font & Lettering Bible: A Comprehensive Guide to
the Design, Construction and Usage of Alphabets and Symbols

by Leslie Cabarga

I just got this book in on Friday, and have read over half of it so far, and find it a great resource, probably on a par with Bringhurst. It is not as much logo as lettering, and font design is included in the latter.