This guidebook to Bhutan was not at all helpful. It is filled with tiny details which may be of interest to the devotee, but gives the average traveler very limited background. You can read about the many different kinds of chortens, for example, but you will find the discussion of Tantric Buddhism in general perplexing. The maps are not good, and no attempt is made to separate the spectacular (such as the Punakha Dzong) from the mundane (such as the Thimpu Dzong). The information on trekking is very limited and dated. Get the Lonely Planet guide, along with the Bart Jordan book on trekking-if you intend to do a trek. Bhutan is a very expensive country to visit, and you should have a better guide in hand before your visit.