This book is required for most dental schools I'm sure, and the only other choice you really have is Rosenstiel's (most dental schools recommand you use both).
This book is VERY basic and will give you the information you'll need to treat patients needing crowns and FPDs. Basically you can look at it as the stripped down version of the Rosenstiel text. It is very clearly written. The line drawings, although cartoonish and crude, are suggestive and get the message across. It's information seem a bit dated, but I still like it for what it is.
Having said that, if you have money for just one fixed prosthodontics textbook, I'd recommand you get Rosenstiel's Contemporary Fixed Prosthodontics
. Yes; it costs and weights twice as much, but it's a pleasure to read. It has great(!) images and color photos (a BIG advantage) and it's very comprehensive. No stone is left unturned with that book. I really can't say enough good things about it. I actually regret not getting it first.
BUT I am reviewing Shillingburg here, and it is a well written book that serves as a good introduction to the world of fixed prosthodontics; it's more of a student's text then a practitioner's one though.
It needs a graphic makeover fast (only 3 colors throughout the book). Also, don't expect any covrage of implants in this book. And since this is purely black and white (and I want to make this clear; there are no PHOTOS here, only illustrations), the color selection section in the book is purely theoretical, and not demonstrative ("hands on").
But I am pleased with the book.
I also think it is fairly priced (having thick pages and a hardcover).
I can't wait to see how the next edition (if it will ever come out) will look like.