The price shown is always including VAT. So if I put $20 then everybody pays $20. If there is VAT involved then I get less. People expect prices with VAT included, so that’s good. If it was not included and it said +20% instead of roughly +5% (as it should be for a book), then less people would buy it.
In any case, the problem is that a VAT of 20-25% is used instead of a VAT around 5%. It’s using the VAT % for video games, not the one for books.