I am part of a men's book club. Next month it will my turn to provide 3 or 4 titles from which they will select one to read the next month. At the end of that month, I will prepare a dinner based on any culinary tips provided in the book we have read. We will dine, then discuss this "book that challenges us...to leave our day jobs behind, to find meaning and enjoyment in literature, and to know each other better in the process."

The 16 members of the club are well educated professionals, ages 40 to 55, married 10 to 20 years, with kids. We have read fairly widely, but in the two years since forming the group, we've never read anything significantly erotic, dealing with sexuality (sacred or otherwise), or any way challenging to our own sense of sexuality. I know almost all of our sex lives are almost non-existent,. Due to career stress, the malaise that comes to most from being monogamous with the same partner for 10+ years, antidepressants and other medications, kids, suburban expectations, wives who have satisfied their need to reproduce, etc., our libidos have been beaten to a pulp. Whereas we are blessed to truly and deeply love our partners, unfortunately we have sex once a month, if lucky - some only once a year.

So I am looking for book suggestions that might perhaps serve to (a) rekindle our libidos, (b) challenge the fixed ideas of our own sexuality, (c) open our minds to the possibilities of alternative relationship constructs (i.e. polyamory, etc.), (d) open our hearts to connecting with the divine through their sexuality, (e) provide avenues to sexually and spiritually reengage with our spouses, or (f) all of the above.

Our book selection rules:
1. No books by women about women
2. Under 500 pages
3. Author has won or been nominated for a major literary award
4. Fiction or nonfiction
5. Any date of publication

On the list already: Henry Miller's Tropic of Cancer, Anias Nin's Delta of Venus

What would you recommend?