July 17th, 2014, 09:27
This is interesting. At the same place I got the Stearman book, I found a copy of Images of America: Sikorsky. It's a handy guide to all the aircraft that Igor designed both fixed wing and rotor.
The neat part is that Sergei Sikorsky had autographed the first page. Sergei is Igor's oldest son. Kind of a bonus bit there.