This is a pretty solid collection of insect and arachnid models (plus a pill bug) which were quite complex by 90s standards. Not all models are of the same quality, however:
The ant is not particularly hard and is absolutely beautiful. I am also fond of the butterfly, which is not up to par with more recent butterfly designs, but which can be folded reasonably well from small and bad paper. On the other hand both of the spider models are abstracted and not very good looking, and the scorpion is quite a lot of work for an unimpressive result.
Overall the diagrams are very clear and well executed, and most of the models are good. I would recommend this book to people interested in moving into complex origami but who still don't quite feel confident that they are ready to tackle some of the more ambitious stuff which has been diagrammed in the XXI century.