Yes, I am a member of POLIS and I am entitled to the agreed discount.

No, but I want to become a member of POLIS.

I am not a member but want to order without a discount.

By pressing YES you indicate that you are already a member of POLIS. This textbook ordering option is available exclusively to members. POLIS verifies that orders are made exclusively by members.

I am not a member but want to order without a discount.