A message with a link to the online-book will come to your email after payment during 1 hour. Be sure to check the «spam» and «mailing» folders.
If after the time the message is not in the email either in «spam» or in «mailing», write to support (the button at the very bottom of the site).
If after the time the message is not in the email either in «spam» or in «mailing», write to support (the button at the very bottom of the site).