The answer is of course you/they did. Kant's 'Critique of Pure Reason' or J.R.R. Tolkien's 'Lord of the Rings' spent years, decades indeed before all the typos were gone - a single work, especially over three hundred pages or four hundred pages long will suffer from such mistakes until printed more than once, possibly more than several reprints. It's far too big a task for anyone with three jobs, or for two people with three jobs, to ever get right first time. But the thing is that it is getting done.
Despite (as I've also written before) the easy bit being the writing, the printing being the nightmare, and the actual selling the real hard work, I'm looking forward to seeing a shiny new book by the press ready for sale.