This author of the play Twilight Bar: An Escapade in Four Acts wrote about Nikolai Soloviev's summoning of intellectuals for finding "Approaches to Survival" in the novel The Call-Girls. He wrote about Spartacus's revolt in The Gladiators, the first 
This author of the play Twilight Bar: An Escapade in Four Acts wrote about Nikolai Soloviev's summoning of intellectuals for finding "Approaches to Survival" in the novel The Call-Girls. He wrote about Spartacus's revolt in The Gladiators, the first book in a trilogy, while the protagonist escapes to "Neutralia" in the last book of Arrival and Departure. The second book of that trilogy is set during the Stalinist purges and sees the execution of the former Commissar of the People, Nicholas Rubashov. For 10 points, name this author of Darkness at Noon.
This author of the play Twilight Bar: An Escapade in Four Acts wrote about Nikolai Soloviev's summoning of intellectuals for finding "Approaches to Survival" in the novel The Call-Girls.
Arthur {Koestler}