You could beat a dragon's skull in with this guide.
The Elder Scrolls: Skyrim Collectors Edition: Prima Official Game Guide is immaculate. Meticulously detailed maps, thorough, well-written quest guides both comprehensive and clear, and every item, vendor, and trainer location in the game have been sewn in to this masterfully rendered tome.
The details of what comes with this guide are on the page, so an in-depth analysis would be both tedious and unnecessary.
I have owned the guides for most of my RPGs including Oblivion, Fallout 3 and Fallout: New Vegas as well as Mass Effect, Mass Effect II, Fable II and Fable III. This one is the best out of them all.
This guide took 2000 hours for Prima to complete, and it shows. If you want the most out of this game, if you want explore every nook and cranny, this guide is the perfect companion.
For those of you who might be worried, this hard-cover guide is made to last. A Harry Potter book probably isn't as tough-looking as this.
My only complaint, and this is an infinitesimally small one, is that the physical map that comes with the guide is connected to the guide itself (which is typical of almost every guide I have ever owned) and must be torn out. This very often (at least for yours truly) results in the edges of the map being torn. However, Prima makes up for this issue raises the bar of game guides by including a code to an online interactive map which may be accessed from any computer.
This is a beautiful, well-written, long-lasting and vast guide that is perfect for a game vast enough to call for it.