Mystery pulpster - guess who

Maybe you've already seen him, almost certainly read his stories, and perhaps even watched a movie adaptation of his novel. Guess which famous pulp author/collector you're seeing (age nearly 20 years) in this photo. Official answer next week, your guesses in the comments. Bonus points for identifying all the pulp titles on the shelves.

Arthur C. Clarke c. 1937 with his pulp magazine collection
Magazines in background include Wonder Stories, Amazing Stories, Astounding Stories and Science Wonder Quarterly