You can pay through
1.e-banking. Transfer to Nina Koevoets, Triodos Bank, in Zeist, Netherlands. IBAN: NL16TRIO0786715146.
2. Paypal: make your payment to nina.koevoets@gmail.com
One book is 11 euro. if you order two, you get 2 euro discount (so you pay a total of 20 euro). Other currencies depend on current exchange rates.