General Resources
A really helpful and practical guide on communication and other ways to help make marriage successful
This is a self-guided book on the therapeutic process known as “Family Systems Theory.” It can be helpful in bringing up and walking you through extended family issues.
Books on the Enneagram
The Enneagram is more than a personality test, it is a way of self-knowing that can help not only with self-awareness but in understanding others. While it is very old (dating to pre-modern times) it continues to be used today in religious and non-religious settings including work, marriage, and leadership development.
Here’s a list of books in order that you might consider picking them up. The first is a very simple and easy introduction and it goes deeper from there.