Something I am just realising: web serialised fiction is a little dangerous. When I pick up a novel and start reading I get extremely engrossed and often don't function much for a while.
But if I go reading stories on the internet it is very easy to fail to notice in advance that I am about to read a million words. If it were a physical paperback book then I would at least notice in advance that it is physically gargantuan.
(i refer to books like that as "groundbreaking, because if you drop it on the floor it will damage the floor".)