The book that describes how id Software created an industry, and why you should do the same
I like book reviews like this, because it explains so clearly and simply why you should read the damned thing. It's great to look and see just how important id was for the PC gaming business as a whole, and with Carmack now working in virtual reality full-time it's likely that he'll be able to leave behind a second legacy.
The final point of this article is also worth repeating: There are so many great tools to use to get started in making and releasing your own game; it has never been easier to get into development. The level of education, either formal or self-guided, and technical knowledge you need to create a game has plummeted. It's never going to be easy, but right now it's much less difficult.