I bought this book for a friend but have read the book myself a couple times. A wonderful reminder that we don't all receive love the same and that finding out and meeting people's needs requires some effort! But it gives lots of examples and illustrations as to how to make sure others feel loved.
I learned a lot from this book, even as a single person. It helped me understand more of what to "expect" someday from a future relationship. It can also be applied to friendships and family relationships in a different way, in addition to romantic relationships.