Marital Intelligence, subtitled "A foolproof guide for saving and supercharging marriage," is based on thousands of hours of marital counseling and observation by the author. Stieglitz is a counselor, speaker, mentor, professor, and leadership consultant based in Roseville, Calif. He is currently a professor at Western Seminary, a district superintendent for the Evangelical Free Church of America, and a church consultant for Thriving Churches International. He also directs his own ministry, Principles to Live By.

Stieglitz says there are only five problems in marriage: (1) Ignoring needs; (2) Immature behaviors, (3) Clashing temperaments, (4) Competing relationships, and (5) Past baggage. With each issue, he carefully and consistently lays out biblical teaching on the subject, and then includes helpful anecdotes, solutions, and self-tests to help the reader.