This is peak Hacker News. Here we have a children’s book about drawing cats using circles. You’re critiquing it for failing to teach how to internalize the 3-d structure of skeletons.
It does the old 'now draw the rest of the f'ing Owl' meme, which can only hurt the kid's self-esteem when their drawings don't match the end result (reflects my personal experience when I used 'how to draw animals' books as a kid).
Use this if you just want to draw some random things for fun, but stay clear if you want to learn to draw (or want your kid to). It's an 'activity book,' not a how to draw book.
And I think that causes the contention; not that it's a kids book, but that it pretends to provide useful education. It doesn't, it'll create frustration if you think it'll actually help you draw animals better.
