Typos will not make or break a story. A well written, well flowing story will carry it self. Typos are a blad reflection on the proofreader and the books editor. I always makes for a better read when the grammer is correct and there are little or no typos. Bad grammer and bad sentence structure, unless it is a spoken word from a character, is a reflection on the authors education or lack of it. A good editor will take care of that for a god or great writer. I know I write and edit a newspaper for a living. I am a photojournalist. My mistakes can sometimes be the talk of the state!