Plows, Plagues, and Petroleum
He convinced me about the methane, but I'm not totally convinced by the CO2 increase, humans cutting down forests does not seem to be enough to account for all the CO2 that would need to be generated. I'm also not convinced that relatively small changes in total world population after a plague in one region could have such a large effect on CO2 levels, yes there would be some abandonment of land, but not as much as he suggests.
Although the book has been written in the last 18 months (published last year, contains data from 2004) it is amazing how out of date it already is. He tends to use a climate sensitivity of 2.5 K (although acknowledging that this is quite uncertain). Few scientists would use such a low figure now, most models are showing 3-4 K as the most likely climate sensitivity, but with a probablitity of greater than 4.5 of 30% or more, and a probability of 2.5 K or less of 0-20%. Similarly he takes the view that ice sheets are stable and melt only slowly, while modern research suggests that they can destabalise rapidly due to the lubrication effect of meltwater. Being out of date is a problem with any book in a fast moving field, so inspite of that I recommend reading it.