If you are submitting a complete MS which is in reasonable shape, we should get it back to you within 3-6 weeks depending on how much work is required. Writing a book from scratch, or rewriting it from rough notes, will naturally take longer. Once we have the final text, you should see a book design within a fortnight, a proof within a further week and your printed books within a further three weeks, provided there are no major revisions or other delays.