Science of Discworld is a very good book, too.
GM: I've been planning this new campaign, in the spirit of wuxia movies, set in... I'm not really sure. Mythic China seems the obvious choice, but I've been thinking, maybe something like modern day but with supernatural elements - you know, kinda like The Medallion or... well, it's a work in progress. Interested?
As-of-unnamed-player: I guess... which rules will you be using?
GM: Well, I was thinking, we could stick to the stuff available for free in the web, so maybe D20 SRD and D20 modern SRD, using Gestalt...
A-o-u-p: Gestalt? With Modern? You'll get some really high-powered characters that way. I mean, not that I mind that much, but players will be wanting quite a bit of combat.
GM: Yeah, that's pretty much what I'm after. If you're interested, why don't you try creating a character? You don't have to fill it all the way out yet, we'll check it before I approve of it. We'll start at level, oh, five or six. Maybe six.
Aoup: ...So, what do you think?
GM: A nine-year old half-giant natural were-ape monk? Are you serious?
Aoup: Well, yeah, although I'm thinking of it as a more of a new race, with tail.
GM: Apes don't have a tail, you know? Oh well...
GM: .... Fine. You can have your tail. I'm also making you twelve, and giving your some stat penalties instead of a level adjustment, so it'll hopefully be playable. You do realize that you only have that high strenght in ape or hybrid form, right? And you'll still likely be terribly underpowered.
Aoup: Nah, I have a good feeling about this one. Besides, if I die, I can roll a new one, right?
GM: Whatever. I still say you're going to be terribly underpowered.