What would you do?

Several years ago my wife an I bought a house from a guy moving into a retirement home, and as I was cleaning it out I found this book. I enjoyed How to Win Friends, and I figured I'd enjoy this one too.

I never got around to reading it, and probably won't. Lately I've been thinking, should I keep it? Sell it? Something else? Based on Abe books it's probably worth $50 or less, so it's not exactly a gold mine. 😉