Great book, thanks. : )

I found some broken links you may want to fix:

Broken link on p. 47 with text "contra-causal free will": http://www.naturalism.org/freewill.htm

Broken link on p. 66 with text "somebody else shows where the holes are": http://singularityu.org/files/SaME.pdf

Broken link on p. 75 with text "This article": http://lukemuehlhauser.com/SaveTheWorld.html

I didn't do an exhaustive check of all links, I only noted down the ones I happened to find while clicking on the links I wanted to click.