Seems like an interesting read, and I thought about getting it (though I'm kind of biased since I agree with Harris' premise). But the top review on Amazon mentions that the author simply "dismisses him [Kant] by saying that he [Harris] has no reason to take Kant seriously.", especially after Kant's extensive work on the topic. (And the reviewer mentions that this seems to be common to Harris work).

This is a huge vice in itself. Yes, sometimes arguments are weak, or there is a new idea, or the argument doesn't work anymore because the world changed so much, or whatever - but then just ignoring them feels pretty similar to the occasional white lie, and an entry to "my argument is superior because I gave it".