Jun Maekawa has been one of the premier origami innovators of the last 30 years. His 'Devil', which graces the cover of this book, is one of the most famous and fantastic designs of what I like to call the Early Age of Super-complexity, (though by today's standards it is more aptly considered high-intermediate). I learned the model from 'Viva! Origami!" which is only available in Japanese. The new folding method in "Genuine Origami" includes the creatures ears which were missing in the original diagrams. I lovingly call this model "Nick, the Nicotine Demon" after I used it to help some of my dorm-mates quit smoking.
All of the models in this book are constructed from single sheets of paper, mostly square, with no cutting or glue. This book is a good choice for a second origami book because it combines clear diagrams with a progression from simple to complex models, ending with the 'Devil'. Note that most of the more complex models should be folded from 10"x10" paper. The most outlandish model in here is a deer folded from a tea-bag wrapper.