To answer the original question posed. The recipes in the old master books are basically just used for glamours at this point. And as of friday, every master book currently out is an "old" book. Is it worthwhile to get the books to be able to make every glamour(and piece of furniture)? Thats up to you to decide. Personally, id say yes but that it wasnt worth rushing to do. But i really like making my own glamours.