In this interesting article from Kotaku, Rob Kuntz relates a history of early TSR that differs somewhat from the narrative we usually hear. It delves into the relationship between Gary Gygax and Dave Arneson (D&D's co-creators) and the actual development of the game, which dates back to Arneson in 1971.

Dungeons & Deceptions: The First D&D Players Push Back On The Legend Of Gary Gygax - Kotaku
Everybody calls Rob Kuntz last, he says. Those who want to know about the history of Dungeons & Dragons start with co-creator Gary Gygax’s kids, one of
