Just read some very good books recently.
First Non Fiction
High in the Empty Blue by A Revell. I've been after this for ages but was always way to expensive. However finally I found it in great condition second-hand for a very good price. Superb read, following RFC 56 Squadron. LINK
The Old Lie by A Revell. As the author is Alex who wrote the book above I had to get it. You know it's going to be historically accurate for starters. Well worth reading LINK
1917 Inherit the Blue by R Eiesle. This is the first of three books that are well worth reading. LINK