Not a book but here are some recently published debates between Jordan Peterson and Sam Harris that are moderated by Bret Weinstein:

https://www.youtube.com/watch?v=d-Z9EZE8kpo

https://www.youtube.com/watch?v=BtkwF5qA6uE

I haven't gotten around to watching them yet (4.5 hours total) but they're supposed to be pretty interesting. The topic of the debate, as I understand it, is roughly whether religion or religious beliefs have any utility from an evolutionary/fitness perspective and/or to what degree could/should we try to objectively evaluate religious/ethical beliefs. Peterson is a clinical psychologist so he's coming to the debate from that angle.