Union Pacific Big Boys in Action by James J. Reisdorff and Michael M. Bartels. This book covers the “Big Boy” engine class between 1941 and 1959, when Big Boys were in regular service in Utah and Wyoming. Coverage is mainly given to those eight Big Boys now preserved at museums and municipalities across the U.S. This black & white pictorial examines how both professional & amateur railroad photographers who came to the Wasatch Mountains & Sherman Hill to see big UP steam before it was “too late” extensively documented them. 80 pages. Softcover.