There are tons of books about Reflexology..
These books are highly recommended for the serious Reflexologist. I have personally referenced these books countless times and I am sure you will find them practical.
Therapeutic Reflexology by Paula S. Stone
Moving the Energy by Lillian Tibshraeny-Morton
Better Health with Foot Reflexology by Dwight C. Byers
Stories the Feet can Tell Thru Reflexology, Stories Feet Have told Thru Reflexology by Eunice Ingham
The Complete Guide to Foot Reflexology by Kevin & Barbara Kunz
( any books by these folks are good! They have written over 20 )
Healing Yourself with Foot Reflexology by Mildred Carter & Tammy Weber
Feet First by Laura Norman
The Joy of Reflexology by Ann Gilanders.
Foot Reflexology A Visual Guide for Self Treatment by Jurgen Jora