Canon Law 

Beal, John P., James A. Coriden, and Thomas J. Green., ed. New Commentary on the Code of Canon Law. New York ; Mahwah, N.J.: Paulist Press, 2000.
Reference 240.9 215 B366n

A comprehensive collection of essays and commentary on the Code by members of the Canon Law Society of America. Focus is on the "lived experience" of the canons in use since 1983.

Canon Law Society of Great Britain and Ireland. The Canon Law: Letter and Spirit: A Practical Guide to the Code of Canon Law. Collegeville, MN: Liturgical Press, 1995.
Reference 240.9 215 C798 C227

A commentary that aims to be both a practical guide and an academic investigation of the law.

Coriden, James A., Thomas J. Green, and Donald E. Heintschel, ed. The Code of Canon Law: A Text and Commentary. Mahwah. N.J.: Paulist Press, 1985.
Reference 240.9 215 C798c

A comprehensive commentary on the Code by members of the Canon Law Society of America. Produced just two years after the 1983 Code was promulgated, some material is now outdated.  Much of the focus is on the differences between the 1917 and 1983 codes.

Marzoa, Angel, Jorge Miras, and Rafaell Rodriguez-Ocana, ed. Exegetical Commentary on the Code of Canon Law. Montreal: Wilson & Lafleur ; Chicago: Midwest Theological Forum, 2004.
Reference 240.9 215 E96 v. 1-5

This work, based upon the 1996 Spanish language Comentario Exegetico, is the most exhaustive and detailed commentary on the 1984 Code. The five volumes in eight parts includes the contributions of over one hundred canonists from six countries.  The text of each canon is provided in both Latin and English along with a list of sources relating to the canon, a list of cross references, and detailed commentary by an expert.