China Civil Aviation History e-books

The military aviation parts of my previous e-books will will be covered in much updated and improved form in a forthcoming series of printed books (Helion & Company). The two civil aviation e-books are now available again. CCAH No 1 = old No 5 and CCAH No 2 = old No 11 (revised). Under work are CCAH No 3 China National Aviation Corporation and CCAH No 4 Eurasia.