The ABA Center recently announced the publication of two new ethics books:
Lawyer Law: Comparing the ABA Model Rules of Professional Conduct with the ALI Restatement (Third) of the Law Governing Lawyers, authored by Tom Morgan, organizes the material into six topical chapters and within each chapter compares the ALI's Restatement to the Model Rules. More information is available here.
Compendium of Client Protection Rules (2005 Edition) includes all of the ABA's Model Rules relating to client protection. More information is available here.