Here's Diane Duane's word on the changes her ebook store is making on 2015-01-01
http://ebooksdirect.dianeduane.com/p...-digital-sales
Meanwhile, for the short time remaining before the change in the law goes into effect, and as a small seasonal thank-you for your past interest and custom, we'd like to offer you a 50% discount on anything in the store! Simply use the discount code DECEMBER3031 at checkout.
This discount will end at 10 PM GMT on December 31 -- when we'll close Ebooks Direct for twelve hours or so to make the software changes enabling the store to correctly charge VAT to our European customers.