A quick look at WorldCat shows that orders from libraries are starting to roll in for Pilgrims on the Silk Road. Here are a few listing the book in their catalogues:
Princeton Theological Seminary
University of Missouri-Columbia
Eastern Mennonite University
University of Richmond
Mennonite Historical Library
Bowdoin College
Texas A&M University
Fuller Theological Seminary
University of California, Davis
Moore Theological College Library (Australia)