The 2020 edition updates the 2010 version as it contains agreements in force and excludes those which have already expired. It also contains links to online treaties databases, primarily the Philippine Supreme Court e-Library (elibrary.judiciary.gov.ph), the Asean Legal Instruments database (agreement.asean.org), and the United Nations Treaty Series Online (un.treaties.org). This is Undersecretary Malaya’s ninth book, having earlier authored or edited books and articles on diplomacy, presidential history, and law.