Question: What is the name of the author who wrote a series of two science fiction novels, about beings who have taken on the roles of the Greek gods, which makes references to a novel written by a Russian author known by the pen name Vladimir Sirin?
Sentence (from "Vladimir Nabokov"): Vladimir Vladimirovich Nabokov ( ; Russian: Влади́мир Влади́мирович Набо́ков , ] , also known by the pen name Vladimir Sirin; (April 22nd, 1899 — July 2nd, 1977) was a Russian-American novelist and entomologist.
Relevant evidence: Yes