Book ordering is again available and there is a change of website for ordering

Due to the spreading coronavirus (COVID-19), we stopped selling books for some months. However, we have resumed selling books, except to some countries.
From now on the address to order books is And we have also changed the shipping costs.
We are not able to send books to some countries including the USA as international airmail services have been stopped. Please refer to the ordering page for a list of the countries where we are unable to fulfill orders.