Containing Matters of Radium, Evolution and Revolution.

Timestamps:

Arelsky biography, non-spoiler discussion (0:00)

"Professor Dagin's Observatory" spoiler summary/discussion 23:20

"Two Worlds" spoiler summary/discussion 36:35

"Towards a New Sun" spoiler summary/discussion 52:06

Bibliography:

Imperia Auctions, Auction 95, Lot 220, June 24, 2022 http://www.auction-imperia.ru/wdate.php?t=booklot&i=79580

Kons - "Stefan Graal Arelsky", Laboratory of Fantastika https://fantlab.ru/autor12055

Nikolskaya, T. L. - "Graal Arelsky: Biographical Information", Library of Maxim Moshkov, http://az.lib.ru/g/graalxarelxskij/text_1994_bio.shtml