You can buy Soroka electronic books on my website, SorokaM.com (this website is in Russian).
Printed books are available on Amazon and other bookstores in different countries. Amazon delivers around the world. This is the list:
U.S.A., Australia, Brazil, Great Britain, Germany, Greece (not Amazon, but a bookstore), India, Canada, Mexico, Norway (bookstore), Russia (website for online orders), Turkey (call +90 533 050 16 30, or send an email to email@example.com), France and Japan.