Hello, being a lab technician I am interested to learn more concerning the scientifical side of soapmaking and saponification. In my search I came across a book which seemed interesting "soap manufacturing technology" from Luis Spitz. But considering it's price, I am hesitating to buy it. Could anybody recommend me a similar book and or direct me to scientifical litterature on soap making. By scientifical litterature I mean more scientifical than just a recipe and the protocol to achieve it. Thanks in advance for your help.