This is an amazing book on colonials, as it not only lists examples but pretty much all known varieties within each series. For example, the Redbook lists examples and certain types, and for colonial series like Connecticut coppers, well, I believe all known varieties have been covered. Also, as far as I know, all recently discovered varieties within each series has been mentioned. The photographs help a lot, and make this more of an attribution guide. Rarity ratings are pretty accurate. I love QDB's works, and have almost everything he has written on coins. This is a great book not only for the novice numismatist, but also for the advanced collector. Before this book, the closest thing was Walter Breen's Encyclopedia, which was a fantastic reference for its time. This just takes that book and pretty much completes much of what Walter was not able to include. So, why only four stars. Well, the biggest irritation is Dave's use of a "new" rarity rating. It is completely unnecessary, and so backwards compared to what we currently use in almost all series, that it only serves to confuse. I have strong doubts that it will catch on. Lastly, the prices for this are somewhat useless, because often times they are way off, and for the most part, it seems useless to add a price guide to something that really requires auction records as well as description to value. For example, the grade of a colonial coin is not the only (and in some cases not even the most important) determining factor. Color and surface quality can be equally important, so the price guide is really superfluous. This is a massive work, and really is a must to any collectors library.