Well first a shameless plug for what appears to be your book based on a quick Google search: https://leanpub.com/u/romanpushkin https://leanpub.com/u/romanpush

Well first a shameless plug for what appears to be your book based on a quick Google search: https://leanpub.com/u/romanpushkin https://leanpub.com/u/romanpushkin I wasn't able to find your book in any pirated source. Do you think you're losing at least 50 sales per month from piracy since you sell the book for a suggested price of $20 each?