Half the time I'm going through this book, I'm enjoying and learning tons of stuff. However, the tutorials are written in a confusing manner, as the author leaves out steps that, while simple and basic, leave the rest of the tutorial in disarray, unless you figure out what was left out. He leaves out parameters to input, which foul the models, and leave one scratching their heads as to where they went wrong. I'm not saying that this is a bad book. It just needs an editor to go through it a second time and point out some glaring inconsistencies, omitted details and the such. After that, I would add at least two stars to my review.