As a self-published author, my 200,000 word 500 page novel is $19.99 in paperback and $29.99 for hardcover and I make a profit of $5 per sale in both formats. My best selling book, The Art Of Not Thinking, is $10 and I make $7 per sale. It's roughly 90 pages in length. The ebooks are $4.99 and 2.99 respectively and I make $3 and $1. The fantasy series will obviously be far more difficult to sell where I focus on writing standalone epics, but if you're interested in a series spanning from a fantasy dark age to post apocalyptic sci-fi and the whole span of time between, it's definitely worth it. The ebook is there for those who can't bear to spend $20 on a book and the paperback exists for people like me who want a book that's like a door into another universe where most series are like a window. The hardcover solely exists for people who prefer that format and don't mind spending the extra money cos I make the same amount in profits despite the price difference. I figured I'd sell it as cheap as I can without breaking even essentially and $16.99/26.99 might as well just round up to 20 and 30 if they're gonna cost that much to make $2 anyways. The philosophy book is my best seller, however, due to the fact that self-help is a more popular genre, the cover is appealing, and $10 is pretty reasonable for a book. My key selling point up to now has been "if you can't let go of $10, how do you expect to let go of stress, anxiety, and depression over far greater issues than a ten dollar bill?"