Here's a review of the track guide from a person on Amazon.com:
I purchased this yesterday at a big box store. In my estimation, it is a very good guide for its intended use. As the title says, it is a "Track Guide." This means that the guide does not cover everything. It is not a game guide. It does not have tips for license tests. It does not give you a trophy list. It does not have a car or event list. There are no tips on B-spec mode, the challenges, or playing online. You'll have to look elsewhere if you are hoping to find this information.
What it does cover, though, is each track in detail. The guide begins with a brief explanation of typical racing terms (camber, racing line, etc.). Next, there is a brief section on racing techniques like the traction circle, overtaking, and the like. These sections are very short (a page or two), but do have some helpful information.
The meat of the guide is the section on tracks. It covers each of GT5's 70+ tracks in good detail. There are pictures of most corners, and the guide gives good detail on how to take each corner, or series of complex corners. It will suggest gearing or average speed, give you pointers about the braking point, entry point, apex, and exit point of each corner. It tells you which rumble strips to use and which to avoid. It tells you where to deviate from the in game racing line (which is fairly regularly), and how to adjust your driving style relative to different car types. There are also tips on tuning for each course, and a general best car to use (e.g. FF, MR, AWD, etc.). The level of detail is very good, and would help those struggling to conquer a track, or those looking for a few tenths.
One thing that did bug me a bit was the occasional suggested shortcut. For example, the author tells you how you can straight-line Monza's 2nd chicane by using the grass. He also tells you the proper racing line for these corners, and obviously you don't have to cheat. I suppose for those new to Gran Turismo and truly struggling that it could help them win a race or two while they are learning, but to me it seemed contrary to the spirit of the game.
Overall, this is a very good guide for what it covers; just don't expect it to be the be all and end all for all info about GT5.
4 out of 5 stars
Ummm . this is the internet ..so.... you at work...well someone will beat you to it 
