This book is organized on the basis of regions of England the way any other tour book would be but with an important difference. The authors assume you don't already know what you want to see. They recommend itineraries to you. They start with the best all-Britain itineraries. Then they proceed to the Best of London in 1, 2, or 3 days. After that it's on to Kent and Sussex in 3 to 5 days, South-Central England in 3 days, Yorkshire in 3 days, Edinburgh in 2 days, Glasgow and the Lowlands in 1 week,the Highlands in 1 to 2 weeks, Wales in 3 days, and North Wales in 3 days. On the back cover it even advertises that the reader can follow the recommended itineraries or mix and match them.
If you know where you want to go and want to use this book to look up additional material on sights to see, stay away! You will only get frustrated and confused the way I did. I was trying to find additional material for a planned 1 week trip to England. I wanted to see Winston Churchill's Chartwell in Kent the first day out of Southampton after disembarking from the Queen Mary. Then I wanted to stay near Richmond upon Thames for the next four nights while I toured London and visited the Churchill War Rooms, the Churchill Museum, Hampton Court, and the Imperial War Museum. The next day we planned to stay at Rhinefield House in Hampshire and tour T. E. Lawrence's home, Cloud's Hill in Dorset. The final day we planned to proceed back to Southampton to board the ship.
I would recommend that you buy Frommer's England and the Best of Wales instead. That guide is also organized by region. But each region lists hotels, restaurants, and sightseeing attractions instead of pre-planned triptiks.
Note: The book has great pictures and maps, but they're all geared to triptiks the authors have in mind --- not me! They don't have an encyclopedic approach.