One of the books that Joel recommends is Expert Secrets by Russell Brunson. I cannot say how much this book really has helped my marketing! I found a free eBook on YouTube and devoured it! Loved it so much I had to buy the book. It is now filled with highlighted marks, tabs of importance, and notes! And, very weird, every chapter seems to be about a half an hour to read. (I'm a reader, so I kind of read fast.) If you don't have this book, either physically or electronically, you are missing out!