Update: You can now also buy the book through Payhip. They support calculating book VAT properly: https://payhip.com/b/tnwvO
Original comment: Thanks for buying!
Sorry about the VAT. It’s an itch issue, they don’t have the correct setup to do the proper VAT for books in EU. It’s unfortunately like this for all books sold on Itch. They are aware of the problem, but no fix seems to be in sight.
Only way to fix it seems to be adding another market place that supports the correct VAT (and also supports selling a HTML book). I’ll look into it at some point, but it will take some time.
Have a nice day!