The Transportation Library has acquired St. Paul Union Depot, by John W. Diers. Here is a description of the book from the publisher's Web site:
A landmark history of St. Paul’s historic Union Depot and a tale of a bygone era when travel and adventure meant passenger trains.
St. Paul Union Depot brings to life the sights and sounds and the behind-the-scenes inner workings of what was the most important rail passenger station west of Chicago. It is also about the people—the stationmasters, mail handlers, train directors, engineers, and others who were employed there, as well as the millions of passengers who passed through its doors.