Tyler Cowen writes

The book is not yet out, but it is the best of its kind since Guns, Germs, and Steel.

The book in question is A Farewell to Alms, and 4 pages into the draft I’m hooked.

cp>Till a few days ago a full PDF draft was available online. This has been replaced with a few PDFs of individual chapters. The author tells me this was done at the request of the publisher, and he intends to put the first eight chapters online.