Guys, I've absolutely loved this book, and I'm still far from finishing. I think anyone who is serious about making an adventure game should read this book.
If you've been into graphics programming for some time, you'll recognize the name Andrew Glassner. He's the editor for the long-standing Graphics Gems, and he wrote this book about how to mix stories and games. He warns from the beginning that this is no easy task.
The book gives an introduction to storytelling, story formulas, and why do we like stories. Then gives an introduction to games (in general, not just videogames), and tells how does the public like to be entertained, and how would it like to be involved in a game.
The book also points to several pitfalls which are common in game design (I've seen them everywhere, including this community), and how can you solve them.
I'm still at a little more than half of the book, but the content is surely very interesting for people in this forum.
Thanks for the recommendation. Here is the link to Amazon.com (http://www.amazon.com/Interactive-Storytelling-Techniques-Century-Fiction/dp/1568812213) for anyone who is interested in making a purchase.