Lee’s research focuses on covenant, public theology, global ethics, and Asian American theology and ethics. He has also centered much of his attention on the ethics and spirituality of Martin Luther King Jr., and has been invited to be the keynote speaker for Martin Luther King Jr. Day celebrations in several cities.

Lee has published several books, including four in English: Covenant and Communication: A Christian Moral Conversation with Jürgen Habermas (University Press of America, 2006), We Will Get to the Promised Land: Martin Luther King Jr.’s Communal-Political Spirituality (Pilgrim Press, 2006), The Great World House: Martin Luther King Jr. and Global Ethics (Pilgrim Press, 2011), and Shaping Public Theology: Selections from the Writings of Max L. Stackhouse (coedited, Eerdmans, 2014).

Most recently, he edited Intersecting Realities: Race, Identity, and Culture in the Spiritual-Moral Life of Young Asians (2018) and coedited Doing Justice: Decisive and Diverse Responses (2019). His book God and Community Organizing is forthcoming in 2020, and he has a manuscript under contract, New Covenant Ethics: Methodology and Practice (Eerdmans).