Pioneering aviation engineer (1889-1972) who developed the first four-engine airplane and the first modern helicopter to be put into widespread use. Signed book: The Message of The Lord's Prayer. First edition. NY: Charles Scribner's Sons, 1942. Hardcover, 6.25 x 9.25, 68 pages. Signed and inscribed on the first free end page in fountain pen, "To Mr. R. R. Lisette, With kindest personal regards of I. Sikorsky, July 9, 1943." In fine condition, with light creasing and sunning to the spine. Accompanied by three vintage unsigned glossy 10 x 8 photos of Sikorsky helicopters.
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