Other Links:

CA Evidence Code regarding mediation confidentiality

Foxgate Opinion
CA Supreme Court on mediation confidentiality.

Rojas Opinion
CA Supreme Court on mediation confidentiality.

Books:

There are many books specifically for mediators themselves. The books below aim for a wider, more general, audience.

Singer. 1994. 
Settling Disputes: Conflict Resolution in Business, Families, and the Legal System

Offers a good history of alternative dispute resolution (George Washington had an arbitration clause in his will! and covers the motivation and results of various ADR methods in multiple realms of disputes.

Caffey. 2002.
Stay Out of Court! : The Small Business Owners Guide to Prevent or Resolve Disputes and Avoid Lawsuit Hell (Paperback)

This is a great book for a business person. He spends at least as much time on ways to avoid business conflicts in the first place as he does on methods for resolving them outside of a courtroom. Of course my favorite chapter is chapter 13 "Mediation - the Greatest Dispute Resolution Tool Ever Invented".

Hewitt.  2005. 
Patent Infringement Litigation: Step by Step from Dispute Through Trial for Executives, Witnesses, and In-House Counsel

Walks the reader through a patent litigation "... his expert then disputes your expert .." . Written to help an executive know what to expect.