I have been a fan of Pollan since I read his Second Nature, which tells his story of a city-dweller buying a country house in northwestern CT and learning about the land, the local critters, and especially about gardening. Suburban and country folk have long-known what he slowly learned, but his fresh eye is illuminating, especially his take on gardening as a war with a nature which wants to return his man-altered spaces to woodland succession - via the weed phase.
He has a new book, In Defense of Food: An Eater's Manifesto. One of his points seems to be that nutritonal "science" is in its infancy, and that it has little to tell us about what to eat. He recommends eating whatever you grandmother would have cooked. Sounds like my kind of book. He is an engaging writer on any topic. New Yorker quality, but no politics.
The Frontal Cortex has more on the book.