The 5 Love Languages by Gary Chapman Book Summary (With Bonus) Happily ever after. Is this just a myth? Why is love so unsustainable and why are there so many obstacles? Gary Chapman is most well-known for his best-selling book: "The 5 Love Languages" which has sold more than 10 million worldwide . Dr Chapman travels around the world and gives talks on marriage, family and relationships . He is indisputably the best love advisor that we could find...