I own both guides, like both guides for different reasons. If you are going for only one guide, then decide your emphasis. If you are most interested in Nevada Chips, thaen I would go with the The Chip Guide (But the other is good also). if you are interested in multiple states, then get the Campiglia Book, the pictures are cool. If you happen to be a fan of Atlantic City, then Archie Black's book may be for you, Illegals , and other locals also have guides.

IMportant point, none are perfect, and all are to some extent subjective. Their guides, not bibles. There are many sources of info, and in making decisions, use as many sources as possible.

I hope this helps, and if I can ever be of any assistance, let me know.