Riley, The Production and Competition History of thr Pre-1939 Riley Motor Cars, A.T. Birmingham, Published by G.T. Foulis, 1965, Ed 1. Hard cover, 248 pages.
Comes in good original dust-wrapper. Plentiful black and white photographs. Some browning to edges.
The definitive book on the early history of Riley motor cars. Extremely comprehensive, an essential reference book.