If you live in the United States, the ninth volume of interviews of people who worked with and for Walt Disney is now available from Xlibris. The book will be available through Amazon in a matter of weeks. This volume, edited by Didier Ghez, contains interviews with Berny Wolf, Art Babbitt, Bill Melendez, Ken O'Connor, Thor Putnam, Art Scott, Ken Anderson, Les Clark, Joe Grant, Walt Peregoy, Frank McSavage, Jack Bradbury, Burny Mattinson, correspondence with Ollie Johnston, and more.
Volume 10 is already in the works. These books overflow with history, technique, and opinion and each works as a stand alone volume if you're intimidated by the thought of trying to catch up.