Even if you don’t want to paint dragons, chimeras or a marsh nymph, the clear instructions and block diagrams here actually give rather a good grounding in animal drawing. You need to ignore or adapt the odd tail and maybe tone down some of the fins, but there’s no doubting that this is well done and achieves what it sets out to do.
Actually, a lot of fantasy and manga guides seem to be well-produced and I wonder whether it has something to do with the fact that their artists have to think more about their subjects. Interesting. General authors should take note.