This is a book written by a scientist who has learned the art of writing well. Tudge explores the central theme of the book - that the growing population of the world will need feeding to a point where we are 9 billion of us on Earth before any fall can realistically be expected - by drawing on a wide range of well researched sources.
He covers a lot of ground: for example, traditional farming techniques in China are contrasted with modern industrial farming in North America & Europe. Tudge speculates on how traditional land-efficient farming can be combined with an urban situation to maximise food production without demolishing the remaining countryside and wild places of the World. He touches (in a timely fashion, as it has turned out) on the impact of the biofuels "revolution".
The book succeds, at least in my opinion, in exploding the myth that modern farming is actually efficient and demonstrates compellingly that we can feed ourselves in the future by gentle improvement on tradional techniques and that modern intensive farming, with or without GMOs, could instead be our down fall.
The writing is fluent, though possibly a little long winded, and some points are laboured perhaps a bit to much; perhaps Tudge underestimates his ability to explain things clearly, a talent he actually has in spades. Nonetheless, this is an excellent book for anyone interested in sustainable developement. I'd give it 4-and-half stars if I could.