Here's a lovely and very well-researched article by Joe Huber of The Opinionated Gamers on Sid Sackson's Acquire, one of the greatest and most influential board games ever made (IMHO). A quote:
Having now detailed the path to the production of the test marketing edition of Acquire, the next step – and the most interesting part of the story, for me – is going through the game’s journey to the Acquire we know and love still today. This is where Sackson’s habit of drafting his letters – and saving the drafts – makes all the difference; as a result it’s possible to follow nearly the whole path.More than 50 years later and the game is still a monumental achievement that I beg people to play every other week. Definitely worth the read.