Christian Egalitarian Leadership takes further steps toward broadening the issues (e.g., it is about more than gender) but also focuses on one essential aspect of the thriving of egalitarianism—leadership.
My advice: Buy this book. Read it slowly. Chew on its words. Digest its content. Let its truths tutor your mind, penetrate your soul, and motivate you toward embracing, modeling, and conveying a more humble, Christlike expression of power.
Seventeen essays explore how the biblical Miriam, Mary the mother of Jesus, Mary of Bethany, and Mary Magdalene were portrayed in the early Christian era, also touching on Jewish and Muslim interpretations.
The Gospel According to Eve is a valuable resource for any egalitarian to have in their library. I also recommend it as assigned reading as part of a larger treatment or course on the history of interpretation.