Vladimir Obruchev – Sannikov Land
Classic Soviet sci-fi, written in 1926. This edition, undated, is likely from the late 40s or ‘fifties. Published by the Foreign Language Publishing House. Great cover and jacket:
Sannikov Land is not an invention of the author, a geologist, but a ‘real’ mythical island believed to be somewhere in the Russian north. A Soviet expedition was sent out in the 30s to look for it, but found nothing. Here is what the Wikipedia has to say.
This volume is illustrated by Y. Krasny. Very cool. Here are a couple: