Ebooks are a digital, non-tangible product. As such, they are not eligible for returns or refunds. In the event of a duplicate order, we will attempt to work with the payment processor to credit your account in the same manner payment was made.  Should we determine the file you purchased is defective, we will happily send you a new file. Otherwise, all sales for digital content are final once the payment has been made as, at this point, you have taken possession of the content and it cannot be retrieved.