Amazon: https://www.amazon.com/Meaning-Marriage-Facing-Complexities-Commitment/dp/1594631875/ref=sr_1_3?crid=259MTNECGIYQZ&dchild=1&keywords=timothy+keller+marriage&qid=1635428650&sprefix=timothy+keller%2Caps%2C404&sr=8-3

Details: This book has helped many marriages over the years. Timothy Keller and his wife Kathy sit down with you and take you step by step between all the different obstacles that marriages seem to go through.

Website: https://www.beating50percent.com/blogs/behindthescenespodcast

Details: A young couple seeking to help other couples to intentionally invest in their marriages. Their goal is to beat the 50% of marriages end in divorce. They share a podcast/blog and also sell books based on the attitude of a lasting marriage.