I bought this book to learn about keeping centipedes as pets. I realize it indicates right in the title that it contains info on all invertebrates (of which there are many) not just centipedes. But what you end up with is a "booklet"
which contains a minuscule amount of basic info on obscure subjects. Cockroaches as pets??? In sum, if you're thinking about buying this booklet to learn about, just centipedes or just millipedes, don't bother.
It contains info which is already available to you for free on the Internet or at your public library.