The "Business" of Sewing, Volumes 1 & 2, by Barbara Wright Sykes are packed with information. From samples of forms and ways to get calculations for fabric and price list samples of work and tailoring jobs. Sykes goes on to tell you about about to start a conversation with a client and how to keep a professional image and respect. She gives inherent details that are a must, details that guide you while your working away on your own business. I believe these books are invaluable. Sykes informs you that you must stay on track and keep working and explains reasons why businesses fail and how you can avoid the same.