We don't read relationship books. I am lucky ot have an SO who is fine showing his emotions and very communicative. Just a tip I've learned though if you are trying to get your DH/SO to read something....put the books behind the toilet. That's how I got him to read al the parenting/pregnancy books I wanted him to.
I told my husband you said this and it cracked him up. He said "We're so predictable..." He would read stuff if I really wanted him to though, lol, never would have thought of doing that but thankfully he's very communicative too