[Auxxx]

It's a hard and serious work to do. Time to time, the PAWN, including SA-MP library has been updated and I don't think it will be left as it is. It'll be continued to develope. By the time you have actually finished writing the book, there might be a lot of new features or changes and you'd have to "update" the book again. I think that SA-MP Wiki is good enought, but an e-book about PAWN language and scripting wouldn't harm us.