Breaking the Spell: Religion as a Natural Phenomenon (hc) by Daniel Dennett for six dollars.
I've read this but didn't have a copy.
Of the so-called "New Atheists" books, this is one which I find most baffling to be lumped in with the others. Unlike the work of Dawkins, Harris, and Hitchens, Breaking the Spell is not a polemical attack on religion in general or religious belief but a call for critical, scientific inquiry regarding religion and its pros/cons; and a survey of what science can, might, and has tell/told us about it.
The review at Majikthise does a good job of explaining what Dennett's critics have misunderstood about the book.
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