I saw the Gee's Bend exhibit and was overwhelmed by the energy, the art, and the human story in those amazing quilts. They were so different from mainstream quilts, and I wanted to find out more about African American traditions in quilting. I stumbled over Signs & Symbols at my local library and loved it. It not only has wonderful photos of quilts, but delves into the symbols and artistic structure of the quilts and how they relate to traditional African art and symbols---with plenty of photos of African textiles, amulets, etc. I'm no expert in anthropology and ethnology, but I am familiar with academic research, and I think Wahlman has presented a wealth of fascinating and compelling evidence for the relationship.
The quilts are truly stunning, the quilting (not just the piecing) shows up well in many of the photos, and dimensions are given (which I'm delighted by---I can get a feel for the measurements of the patches and blocks). This book's quilts are informing my own quilts and will be for many years. In terms of influence on my work, I put Signs & Symbols in the same category with Liberated Quiltmaking (by Gwen Marston).
Be aware, this is not a how-to book. There are no projects, and no descriptions of how to make quilts. But if you like quilt books that are filled with beautiful old quilts, and want to immerse yourself in a different and entrancing quilting tradition, you'll love this book.