The best book you have never heard of... how about The Wit of Martin Luther by Eric Gritsch.
So many people think of church fathers as heavy reading, deep theology, etc. This tiny book shares just how much Martin Luther had a sense of humor and zest for life (and a great deal of passion for his beloved wife Catherine!) So break away from weight of ages past and learn how to enjoy every gifts you are given with a hearty German appetite.
Amazon: The Wit of Martin Luther