Traditionally the summer months were slow times for new books, but in today's always-on world seasonal differences are less pronounced and it was a struggle to decide which ten books to feature as particularly notable from our list of July's best books (see best books coming soon). Interestingly, and entirely inadvertently, three of them have aviation as a theme - from the very early days of flight, to the space program of the late '40s through '60s, and into the distant future.