You are bidding on two Great Northern Railway Historical Society booklets entitled The Great Northern Empire Builder.  The two booklets are Part 3: 1951 -the Mid-Century and Part 4: 1955-59.  The 28 pages of these two publications provide historical and other information about the types of passenger cars assigned to the Empire Builder and the consists used by the railroad for this famous transcontinental train.  Black & white photographs and drawings illustrate the information.  The two booklets are Reference Sheet No. 209 (12/93) and Sheet No. 227 (3/95).  They show light soil and wear but are otherwise in very good/excellent condition.  Buyer pays $2.75 shipping in the U.S. . . . and check out my other eBay railroad auction items.  I do combine shipping.  Thanks for looking!  Praise God!