Prototypes – The History of the IMSA GTP series book - By J.A. Martin and Ken Wells. The complete race by race detailed breakdown of the GTP era from 1981 to 1993 with b&w and color photos, 512 p., hardbound with d.j., 11.5” x 9.5”, signed by J.A. Martin. A- cond. (shelf wear on d.j.).