I've only been religiously folding origami for 3 years and I have folded more of Tomoko Fuse's designs than any other origami artist's designs. I don't speak or read a lick of Japanese but the great thing about her diagrams is that I don't need to. They are detailed and precise and always a fun challenge!
Tomoko is known for her style of unit origami, boxes in particular. Just when you think there couldn't be any other way to make these beautiful boxes, she shows you that there is! Perfect to give away as gift boxes and wrappings (envelopes). I recommend this book to any serious folder. One should have a bit of experience folding as these designs aren't for a complete beginner. (Intermediate skill level).