My number one book recommendation for couples is Getting The Love You Want by Harville Hendrix and Helen LaKelly Hunt. Although this book was originally published in 1988, it is still very relevant to today’s 21st Century couples. It is readily available online or in your local bookstore or library, and it comes in various formats—paperback, kindle, audible, audioCD.
My clients report that they love the stories about other couples in the book, as well as how it helps them understand more clearly the Imago theory we talk about in our sessions.
Harville and Helen are still actively teaching and you can check them out on YouTube, or for a very recent interview (10/23/18), you can google Marie Forleo interview with Harville Hendrix. That will take you to her website where you can watch the interview. It’s about an hour and well worth it.