Writing a book is a long, challenging project which is quite rewarding at the end, when the book is finished. That alone give the author a good feeling – sense of accomplishment, getting to know the characters, etc. But the biggest payoff for me is when I hear from someone who took time to purchase the book, read it, and let me know how they liked it.
Take a look at the picture someone sent me. She was snowed in, had a fire going, an adult beverage of her choice (not sure about that!) and she was enjoying my book. Does it get any better than that? Not for me. Truly warms my heart.