So, to my surprise, this book doesn't actually talk about the musical Wicked (the title and the rainbow on the cover threw me off), though it does mention The Wizard of Oz in a couple of places. This is fine. Actually, Gress goes to work examining the ideological roots of feminism, which turn out to to be Enlightenment Rationalism and Marxism. This puts the movement at odds with Christianity since both sources are distinctively anti-Christian and often anti-woman.
Gress is a talented and clear writer who approaches her subject with a wealth of knowledge. Still, I wish she handled more of the common objections that stress the victories of the feminist movements (like voting and access to the professions) instead of going into the weeds of the phenomenological philosophies of St. Edith Stein and St. John Paul II. Maybe the hope was to rise above these disputes and go deeper? I guess this is fine for the most part, this is fine, but it can feel a little academic and dry sometimes.
All that said, it's still a great read and highly informative for anyone interested in this important issue.