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Improve Your Marriage and Relationships
Boundaries: When to Say Yes, How to Say No, to Take Control of Your LifeBoundaries: When to Say Yes, How to Say No, to Take Control of Your Life by Dr. Henry Cloud
Buy new: £6.45 / Used from: £4.44
Use this book to fix your own issues
Boundaries in MarriageBoundaries in Marriage by Dr. Henry Cloud
Buy new: £6.35 / Used from: £6.52
Use this to relate correctly to your spouse
Boundaries with Kids: When to Say Yes, How to Say NoBoundaries with Kids: When to Say Yes, How to Say No by Dr. Henry Cloud
Buy new: £7.02 / Used from: £3.96
Find out how you should have been brought up
His Needs, Her Needs : Buidling an Affair-Proof MarriageHis Needs, Her Needs : Buidling an Affair-Proof Marriage by Willard F. Harley
Buy new: £5.47 / Used from: £0.83
This helps you figure out what your spouse needs and how to provide it
Kosher Sex: A Recipe for Passion and IntimacyKosher Sex: A Recipe for Passion and Intimacy by Shmuley Boteach
Buy new: £8.21 / Used from: £3.93
Rabbi Shmuley explains God's plan for marriage better than anything else I have read
She Comes First: The Thinking Man's Guide to Pleasuring a WomanShe Comes First: The Thinking Man's Guide to Pleasuring a Woman by Ian Kerner
Buy used from: £10.97
I first listened to the audio download, and was so impressed that I bought the book as well. Ian's advice is easy to understand and isn't a gimmick. It works, for both of us.
What Women Want Men to Know: The Ultimate Book about Love, Sex, and Relationships for You - And the Man You LoveWhat Women Want Men to Know: The Ultimate Book about Love, Sex, and Relationships for You - And the Man You Love by Barbara De Angelis
Buy used from: £1.39
This isn't as well thought out as some of the other books, but it is practical and it gets the point across
Multi-Orgasmic Man: Sexual Secrets Every Man Should KnowMulti-Orgasmic Man: Sexual Secrets Every Man Should Know by Mantak Chia
Buy used from: £5.90
Probably the most thorough explanation of how the male sexual system works