I'd settle for spelling and malapropism checks.
In the past it wasn't even the author's fault necessarily. The worst case of this was an anthology of Ursula Leguin, "Five Complete Novels" where I quit recording the typos as there would be multiple per page
If the typos are in the printed book, that's bad.
At the very least, end it on a high note that you can be proud of -- don't let it degrade slowly until people are openly mocking it.