Travel photography is my hobby and i took it very seriously since few years now. I am writing an eBook about learning the art of Photography. Just need some suggestions here. I am planning to sell it on my website. I'll promote it on FB and probably adwords/bing too. i hope I'll make some money selling a few copies to the learners. Just need some valuable suggestions from all fo you. suggest me some good payment processors to use. Plus give me some marketing ideas.