Sergey Ayrapetyan

Sisters Maria and Anastasia are best friends, and they cope not only with a grumpy mother, but also with ancient magic, because of which winter has not come in their village for many decades. The girls manage to overcome all obstacles, drive away the evil witch, melt the heart of the Lord of Cold, and also find love.

Barcode readers and printers, target designators and rangefinders, new-generation surgical scalpels, and even cold fusion. All this works with the help of a laser, a unique invention of the brilliant Soviet physicists Alexander Prokhorov and Nikolai Basov. In the mid-1950s, they designed an optical quantum generator, which served as the basis for the creation of combat lasers.