I have quite a collect of books when it comes to soapmaking, here are just some of my favorites
The Handmade Soap Book (The Handmade Series) by Melinda Coss has beautiful illustrations
Handmade Soap by Tatyana Hill the soap pictures inspire you to be creative with your own soaps.
Soapmaker’s Companion: A Comprehensive Guide with Recipes, Techniques & Know-How (Natural Body Series – The Natural Way to Enhance Your Life) by Susan Miller Cavitch is very good soapmaking book for anyone wanting to make cold process soap.
Soap: Making It, Enjoying It ~ Ann Bramson I found this book to be a good read
http://www.archive.org/details/soapmakingmanual00thomrich dowload the pdf file to your desktop. This is an e-book on soapmaking back in the 1920’s.