The Rough Guides offer fairly good travel recommendations for trip planning and the third edition of their Yosemite book is no different. If you want to enjoy a fairly traditional vacation in Yosemite you can find all the contact numbers you need here, as well as descriptions of lodging, bus tours, etc. I was pleased, in fact, to see that the author recommended Green Tortoise and the Yosemite Bug Hostel "Bug Bus" for those seeking group tours. Neat activities for kids, where to find internet access, tips for good pictures, and notes on local attractions (don't forget the Valley Cemetary) round out the first half of the book.
On the other hand, I really was hoping for more of a guide to outdoor activities, and these receive a decidedly short stick in this book. Author Paul Whitfield does offer short descriptions of 50 hikes, but none that you would not find in other guides. Indeed, he claims that if you just walk 20 minutes from your car you will be free from the crowds. Not on many of these trails. Mist Falls, the Four Mile Trail, Yosemite Falls, Panoramic Point Trail, and the climb to Half Dome are all very popular. He does of course include other standard walks: Wampama Falls, Soda Springs and the Wawona Meadow hike. Six backpack trips round out the rest of the book.
The part of the book I appreciated least, however, was the format. The print is tiny, the pages off white, and key information is in tan boxes which give the book a drab look and make it difficult to read for any extended period. It does not have enough plates to make up for the difficult read.
On the whole then, this is a decent book for planning a vacation with, but there are better choices out there. Moon Handbooks Yosemite by Ann Marie Brown is the best of these. A new edition of it is due out this year. For day hikes, I like Robert Stone's Day Hikes in Yosemite National Park and, for shorter walks, Best Easy Day Hikes: Yosemite. The best source for the park as a whole remains Jeffrey Schaffer's Yosemite National Park: A Complete Hiker's Guide. The bottom line on this book then is you can use it for trip planning, but there are better sources out there.