I couldn't put it down. In addition to the classic Inca Trail the book covers the more recently opened shorter trail and other treks that can be done in the area. The Inca Trail casts such a spell that one day I hope to return and do it a third time. That may not be for a few years, but the author has stated his intention of producing up-dated editions when necessary and the book deserves to be popular enough to justify that. Danbury's guidebook fits very easily into the smallest pocket on most rucksacks.
Every chapter is chock full of interesting research and conclusions.
Even the index was remarkable for its detail. You will be informed and entertained by amazing stories about what was eaten, how it was eaten, and why it was eaten. You will learn the surprisingly interesting history of corn. You will learn the origins of the algae spirulina, recently come to our health food stores. The fascinating story behind the newly popular grain amaranth will interest you.