I don't count in words but page numbers, but reader like me read ~100 page/hour (depending on the book it can be more or less). A 600 page book is 6 hours, which is roughly as long as the train ride to Paris (3 hours, both way) I take twice a month. ~24 books just to pass the time (in truth I also read non-fiction to sleep, and fiction during the weekend, so I'm probably above 40).