I've used prior editions of this book on my travels. It's a good book if you're looking to do a whirl-wind 2 week to 2 month tour of mostly western europe. If you have more or less time you should certainly be looking at other more detailed books. (If you have less than say 2.5 weeks, you should probably also be focusing your trip more geographically). But it's good to give you a _quick and basic_ idea of what to do and see and where to stay.
Ireland, Britain, The Netherlands, Belgium, Luxembourg, Germany, Austria, Switzerland, France (Including Corsica), Italy (Including Sardinia Sicily), Spain, Portugal, and Greece. Also Liechtenstein and Andorra (and Monaco and Vatican city!), but those hardly count as countries. I haven't seen this mentioned anywhere on Amazon or shown in the preview.