Books I isn't a top notch RPG and it has many flaws or half flaws, like a writing often not really good, good but not enough puzzles or secrets, many fights lacking of depth, and some more.
But it's a rather unique game that succeed gives a real time feeling to a turned based game, and that implements a soft Roguelike RPG. The point of Book 1 is survival, finding the numerous little tricks and discover the class system. On top of that it has a good exploration and cute graphics and a bit of everything at a fairly good quality. But survival+tricks+character management are the charm of the game.
Book 2 is a quite better game and almost everything is a bit better or better. But it fails on two points, too many elements remind too closely Book 1, and it fails reproduce the same mood of survival that has Book 1. Book 2 is quite better but it isn't as attaching than Book 1.