There is a reason books are right justified. I recently had a book that was left justified, the same as you'd see in a letter. It looked TERRIBLE. It was hard on the eyes, and it sure didn't make me want to read it. It was well-written, the plot was good, but it would have been a much more enjoyable book if it had been right justified. It sounds like such a silly, small, detail, but the incorrect layout gave the book a very amateurish look. Add to that the enormous number of typos and I'm afraid that this particular book is destined to have lackluster sales. You put so much time and effort into writing your book - don't ignore the final touches that will make a customer want to buy your book!