If you want a little taster of what's to come in the full book then please check out the article I wrote for gamedev.tutsplus.com called How to Build a JRPG a Primer for Game Developers where I take a look at a few of the systems that make up a JRPG. (Though the book is far more specific and you get real working code :D )
Also it's Ludum Dare this weekend, a global game jam where you're challenged to make a game in 48 hours. It's a great way to actually get something done and get some experience finishing a game. If it that sounds tempting then I strongly encourage you to give it a go!
If you want to be notified when my RPG book is released then please sign up here.