"Unusual Tales", a series presenting Steve Ditko's comics from 1957 to 1959 that are in the public domain.
Clever little story, and a lot of great storytelling by Ditko. In particular take a look at the bottom of page 3, a nice example of Ditko's work from the era, and a perfect final panel. A lot of good uses of the tall shape you get from the 3x2 six-panel grid.
But before the story, some links:
New edition of classic MR. A available
New issue on Ditko's black&white work out soon
Ditko/Wood STALKER in upcoming DC collection
Scans in this series generally adapted to my personal tastes from those copies
Click to embiggen