We use Paypal to send your profit payments. When listing your book in the bookstore you keep 100% of your sales profits, no fees, commissions or royalties. We total your sales at the end of the month and after subtracting the cost of printing we send you the balance. We send profit payments around the 15th of the following month, assuming your balance is $40 or more (U.S.). If you do not have a $40 balance, your profits will be rolled over to the next month until that amount is accumulated. Each book you have in the bookstore is dealt with separately and a separate check is made for the profits derived from its sales. We do not calculate profits based on the author but rather on the book.