I have enjoyed reading the following two festshrifts in Wesleyan and Protestant theology by persons involved in the life of the church, especially at the seminary level. The first book by Theodore Runyon has some wonderful essays from his teaching years at Candler School of Theology. I was fortunate to work with Ted and gain an appreciation for the wider German influence in American Protestant and Wesleyan theologies, particularly in line with German Pietism. Ted was also instrumental in helping me to spend a year in Gottingen studying Barth and Bonhoeffer. Ted's book takes readers into the meaningful ways Wesleyan theology can interact with other aspects of German Protestant theologies, namely, with reference to theologians like Moltmann, Tillich, and Gogarten.
The second book of essays edited by Nathan Crawford of Indiana Wesleyan University in honor of Laurence Wood also helps to explore the continuing relevance of Wesleyan theology for the church. There is a distinct emphasis in the essays on the unique contribution the Wesleyan tradition has for theological reflection and scholarship.
Both of these books are in print from Wipf and Stock Publishers.