|The only book you kinda need|
Borrowing a bit from engineering, I think of character creation as a (fun) version of responding to a request for proposal. The GM is soliciting you to take part in a game, and you in turn are expected to create a bid and proposal that explains how you and your character fulfill the needs of the GM, which are, hopefully, described in some kind of campaign planning format. The GM asks for characters that want to perform mission x in setting y, and you are going to explain why your character z is fit for mission x in setting y.
Writing to Your Audience
- Yourself, the player
- The GM
- Optionally, your fellow players