I've just tried to find Gary Overacre on the web. This page, http://scad-atl-illu.blogspot.com/2009/05/what-weekend.html, has a link to www.garyoveracre.com but it doesn't exist.

Jeff Atwood has the same link on this Coding Horror page: https://blog.codinghorror.com/are-recipes-for-novices/.

Perhaps Atwood knows where Overacre is?

Gary Overacre seems to have been a moderately important illustrator in the US with magazine covers and board games to his credit but now he's slipped into oblivion. Not even a Wikipedia page