Here's a single image that conveys an entire story...
...a, sadly, never-completed tale meant for one of the Charlton sci-fi anthologies of the late Silver Age.
Probably abandoned when Jim Aparo joined editor Dick Giordano when he moved over to DC, it's typical of the detailed work Aparo produced for them, despite the awful printing that would obscure a lot of the time-intensive rendering.
The Comic Reader was a late 1960s-early 1970s newszine/fanzine, available at comic conventions and by subscription.
The covers were almost always featured art exclusives, either pieces done to promote current projects (a Manhunter cover by Walt Simonson during the character's revival in Detective Comics) or unpublished work like this one that editor-publisher Paul Levitz felt deserved exposure to an appreciative audience!