"This historic book may have numerous typos and missing text."
The first sentence should be enough to change your mind. In case it doesn't , let me make it clear: It has a typo in every other paragaph.
"We scanned this book using a character recognition software that includes an automated spell check. Our softare is 99% accurate if the book is in good condition."
I'm only guessing this book was in extremely bad condition when they scanned it. As if that were not enough, the publisher's note in the book also mentions that it might have missing images and indexes too. And the page layout and alignment is honestly ridiculous (each page has three columns) and their character recognition software is a disaster; NONE of the mathematical signs are printed properly. Not even the plusses and minuses. The italicized 'n' is replaced by "<<" or ">>" for some reason. Zero is written as "o" and 1 becomes "I" or "i" depending on which page you are on. This is pushing the definiton of what can be legallly called a "book". WHY ON EARTH WOULD YOU PUT SUCH A MEDIOCRE PRODUCT FOR SALE? And what is with the cover picture? No, seriously, what is with that?
"We would like to maually proof read and fix the typos and indexes, manually scan and add any illustrations, and track down another copy of the book to add any missing text. But our books sell so few copies, you would have to pay up to a thousand dollars for the book as a result."
ORLY? General Books LLC, here's a piece of advice. Have some integrity. Take your job seriously. I am sure there are a lot of rich people out there who won't mind paying up for a good book. I won't be ordering a book published by you for the rest of my life but don't let that demotivate you.