Wagner. Centered on GMC's most successful decades, between 1927 and 1987, this title covers the in-depth history of their trucks and predecessors Rapid and Reliance with particular emphasis on heavy-duty models. You'll enjoy coverage of every model, including engine specifications, year-to-year changes, and charts, along with the background story on the makers and its major influences. 126 pages, B&W and color photos, 8½"x 11", softcover.