I started using Lonely Planet guides for travel in 2002, and have been spoiled by the thoroughness and level of detail - especially with regard to the needs of independent travelers - that LP usually offers. This guide is the first one I have purchased that seems like a total departure from that ethos.
To use an analogy about another U.S. media form, the old, larger Lonely Planet guides were like the New York Times or the Wall Street Journal; this one is like USA Today. Lonely Planet Alaska is full-color and magazine-like, and if you've never been to Alaska, it could be helpful in getting a general idea of the regions you might want to visit and idea of what to expect from Alaskan travel in general. However, it does not provide enough information for detailed trip planning for the off-the-beaten-path traveler who is not content to take tours and cruises.
Most of Alaska is indeed sparsely populated and difficult to access, but in spite of that (and perhaps because of it), an area twice the size of Texas and the size of 1/5 of the Lower 48 states that has many unique natural and cultural environments requires a larger and more comprehensive guidebook than this. It has maybe 1/3 of the text that the LP Texas guidebook contains, for example.
There are only a couple of column inches on backpacking and mountaineering in Denali, even though the park is larger than the state of Massachusetts and has a complicated system of 80+ backcountry units to choose from. The entire Alaskan bush region only gets a few pages. The authors are dismissive and flippant about Fairbanks, Alaska's second-largest city. The book failed to answer some of my travel companion's basic questions, such as "can you view glaciers in Denali?" and "what times of the year is it feasible to drive to Barrow?" Prudhoe Bay and many interior towns were not mentioned at all, and information on Alaskan lifestyles in the different regions is sparse. The suggested itineraries seem like an afterthought and are too non-specific to be useful. Winter travelers to Alaska will also find that the book includes very little information specific to winter travel and activities (although admittedly, the vast majority of tourists in Alaska visit in the summer). There are a couple of typos also.
I am going to order a copy of Mileposts (even though I hate the idea of ads in a guidebook) in hopes of getting a more thorough guide, and will use WikiTravel for some of the detailed aspects of my trip plan. The book did help familiarize me with travel opportunities in some of the regions of Alaska I have never visited, and the photos are stunning.