What is best resource to explain the Catholic position on artificial birth control?

What is the best resource I can get for my non Catholic friends who want to understand the Catholic belief about artificial birth control. I like Humana Vitae but I’m afraid the references to other Catholic beliefs will distract them. These guys think I’m nuts. I’m glad I can witness but I need some help.

Thanks

Dear Dad,

Give them the book, “Good News About Sex and Marriage” by Christopher West. You can order it from the Catholic Answers Website.

Fr. Vincent Serpa, O.P.

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