After writing the best-selling Letters To Karen for his daughter, Shedd compiled Letters To Philip from a series of letters he’d penned for his son. The result was another best seller, thanks to the book’s easy-to-read style.

It’s broken into 29 letters, each of which was designed to give Shedd’s son a concise breakdown of how to build and maintain a successful relationship.

First published in 1968, Letters To Philip is just as relevant today thanks to its crucial lessons about communication, in-laws, bad moods, and more.

Both witty and poignant, this book’s three daily rules for husbands -- tell her you love her, do something nice for her, and pay her a compliment -- have yet to go out of style, even 40 years later.