That's forgiving too many sins just because they're not going "pro". The vast number of typos is inexcusable. All you need to do is give copies to a few people and have them mark it up. Hell, I make my computer read my scripts back to me and I can HEAR the typos. I think we're all for small-press and DIY, but there's a basic level of competency that we expect from printed works, and an author/publisher who can't be bothered with the most basic cleanup doesn't strike me as serious about their work.
How could you spend the years on this the author is supposed to have, and NOT get the English mechanics looked at and fixed? It does speak about the author, like a restaurant with a dirty bathroom.