We all have dealbreakers for books, as we do with most things in our lives.  One of the biggest dealbreakers for me (one of the only things that will actually make me put a book down) is poor grammar and spelling.  I get that a lot because I read a lot of self-published works but I have to remind myself that self-publishing is no excuse for multiple editing slip ups.  I’m talking about run-on sentences, no commas, basic grammar errors, etc.  I don’t mind one or two words that have minor misspellings because even professionally published books have those on occasion.  But when it’s one or two per page?  That, my friends, is a dealbreaker.  So what are your dealbreakers for books?