I can tell you that I have been depressed for years and hiding it pretty well from people because I disagreed with taking Paxil which had sexual side effects. I had to go to the doctor recently to get this treated and he prescribed Wellbutrin. Its an anti-depressant with a great side effect for you 2. It also increased libido which I can attest to. Im told that Zoloft does something similar too. Just throwing that out there.
On another note, if you want her to read a book of some kind, why dont you just order one and read it yourself. So you can understand what might be going on. If she wants to read it or sees that maybe youre learning from it maybe she will read it too.
With that being said I would agree that it sounds like you might be a little overly concerned with sex instead of your wife's health. Im not trying to put you down, just saying that it isnt a life or death thing not having sex for a bit.
M:33 W:30 T:10 M:2 B/D: 5/27/14 S: 5/28/14 Wife moved back in 7/18/14