This is what my wife and I found helpful:

I am the poster of the original newlywed comment. Here are some sources/suggestions that worked for us. Every couple is different, so these would obviously need to be adapted to each couples own needs.

For general love/relationship strength, my wife and I LOVE the book “The Five Love Languages” by Gary Chapman. His approach includes spirituality (not LDS) without catering to a specific religion. Whether or not you subscribe to his categories, it is helpful in teaching how to listen and respond to your spouse in ways that they will understand and appreciate.

For communication about intimacy, we like the book “Getting the Sex You Want” by Tammy Nelson. Again, since the author isn’t LDS it contains some things that aren’t applicable to church members. However, The structure for dialogue and the important aspects of intimacy are communicated. I think it might have been written for established couples, but my wife and I believe that establishing communication early helps to avoid problems later.

Actual technique is a tricky arena. Knowledge of the “how-to” can give the inexperienced confidence and willingness to try; however, finding an appropriate medium of teaching is difficult. We have our own preferences when it comes to these, but I think that each couple needs to research and select their own. There are lots of books out there that can definitely help; however, make sure that there aren’t actual pictures in the book. There are plenty of books that have illustrations, either vague or humorous, to help take the “erotica” out of the instructional. The more adventurous can go onto reputable websites such as Men’s Health, Women’s Health, etc.; however, we found those a little more advanced than we needed at the beginning.

I would like to add a side note: we actually did search for books written by LDS for LDS; however, we found that most of them were squeamish about addressing the actual act. The spiritual significance of intimacy in a temple marriage often comes fairly easily to those doing what they are supposed to do. The physical is likely to be the most difficult and trying aspect of intimacy. Because of this, we found secular books to be much more helpful for confidence and technique. I had to go through tons of books regarding this subject before I found the one or two that I liked. You never have to apply everything in a book. I think people can figure out what they need and what they don’t once they actually get to the point of reading this stuff.

If anyone has an LDS book on the detailed physical aspects, please post it.

Thank you very much for posting this very valuable information!! I am in agreement with everything you said.