Also: it was offered to you by a friend, the equivalent of them passing you their physical copy;
You don't actually want to read it, you just need to look up that one quote/scene, and you can't find it on gbooks;
The publisher is a terrible person, and the author/editors aren't getting money for it anyway (I have zero shame pirating academic journals)
You paid for a copy, but the drm/formatting/editing issues make the Russian pirate site a better experience to read.