My dear boys. Kassil L.A.

Difficult cap Butyrev: my father at the front, my mother died at the first raids of the Nazis, the trash, like many of his friends, works at the factory, and two sisters are ruled at home. From the besieged Leningrad. The Nazis here do not allow them to calmly comprehend marine science.

What to say! It is difficult for everyone: war. And yet it is easier when you unite together against the enemy. And three great masters help in this struggle - Amalgam, Isobar and Dron Garden Head.

Before the reader - an amazingly bright and life -affirming, full of faith in the victory L. Cassil, written in 1944.

for secondary school age.