Along with Frommer's Alaska 2004, this is tied for first place among the Alaska travel guides. Especially for the outdoors stuff they include. There are 70+ maps inside, showing trails, waterways, etc., for the adventurer. And there is an entire section devoted to the top ten of hiking in Alaska. For an adventuring trip to Alaska, this book is great.
But I believe it's also the best of the "big 3" (Fodor's, Frommer's, Lonely Planet) as far as how much it encompasses overall. It is quite comprehensive for the tourist, pointing out all of the things a tourist may want to see, and it balances this with the same amount of equally useful information for people going to Alaska to kayak, hike, bike, and explore.
While I still enjoy the Frommer's Alaska more than any of the Alaska guides, this book has things that Frommer's doesn't when it comes to tourist-oriented sightseeing. Fodor's Alaska 2004, on the other hand, is almost entirely tourist-oriented, with little useful information for anyone going to Alaska to adventure. But this book is a solid guide, and I've taken it to Alaska with me on my adventuring trips. Worth the money, and my time to recommend this book!