Caption: Tom Swift and his Giant Telescope, 1939.

Actually, I was never a Tom Swift fan nor a boy with a telescope.

Credit/Permission: Anonymous artist?, 1939 (uploaded to Wikipedia by User::Sherurcij, 2007) / Public domain.
Image link: Wikipedia: File:Tom Swift Cover 1939 unrenewed.jpg.
Local file: local link: tom_swift.html.
File: Art_t file: tom_swift.html.