Is it ok to illegally download a book I already own?

It’s not acceptable to steal the electronic version just because you bought the hardcopy. They are separate entities, says ethicist Chuck Klosterman. 

I’ve recently been buying physical books and then illegally downloading their electronic version, so I can read them on my Kindle when it’s more convenient. Is this stealing?

If you were just asking a semantic question about the definition of the word ‘stealing,’ then, yes, in the biblical sense, you are stealing. But this problem is more complicated.