Received the newsletter and found out the book is on discount again, but I get the same problems as others when trying to purchase the book. It always gives me an error page with "There was a problem handling your request". I'm also unable to sign in to the "regular" Affinity site, getting the message "Error: The Email address or Password is incorrect". And also no mailreply when trying to get a new password via the "Forgot password?" function. Trying this on OSX El Capitan with Safari, Firefox and Chrome + Safari on iPad, from Norway. No luck with either the link in the newsletter or the "marketing site workbook page" (as suggestet above).
Crossing fingers! :-)