Unfortunately, Germany taxes paper books and ebooks at a different VAT rate.
If you look at http://www.vatlive.com/vat-rates/european-vat-rates/ you will see that while there is a 7% VAT rate on physical books in Germany, there is a 19% VAT rate on ebooks.

As a Canadian startup, we have no input into the VAT rates charged by various EU countries -- we just comply with them!

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