This book purports to be a guide to all of the hot wheels cars produced for the last thirty plus years. It's very up-to-date, and well written and thought out. It has lists of all of the cars, with the early ones priced by color so you can keep track of which ones are more or less expensive. The colors in the color guide don't look that good to me, and since there are so many shades, I didn't find it that valuable, but the price guides are very good. They aren't completely up to date in and of themselves (how could they be?) but they're as good as they can get, and you can use them to judge how much one color will cost as opposed to another.