Bristolian Derek Robinson's books cover a range of interests, however my personal choice would always be his wartime fiction, either from World War 1 or 2.
New readers may find his penchant for developing a character only to destroy this "person" on a whim, rather disconcerting, however it effectively puts across the feelings of those serving during wartime, who meet new friends only to have these friends lost within a week or two. The flying sequences aren't overburdened with technical detail yet retain an authentic feel for those who are particularly concerned with "accuracy".
The non-flying sections are generally well paced, the slower parts generally being due to the occasional lyrical passage, where some hard-bitten character will contemplate the beauty of a sky in which he'll probably be fighting for his life later in the day. When reading these books I generally end up thinking "this would make a great film!", mainly because the great number of films on the subject never seem to strike the balance that Derek Robinson achieves with ease.
One book "Piece of Cake" was turned into a 6-part TV serial in England, however, that serial never quite hit the same note as the book, especially with the (occasionally grim) humour of the book almost entirely removed, particularly the more slapstick elements.
War Story and Goshawk Squadron both cover the World War 1 scenario in northern France and in this writer's opinion are examples of the best in Derek Robinson's writing, with War Story having the edge.
I think that anyone with an interest in this era of conflict, and the unique relationships which were forged during that time, will love these books. If there is any criticism to be levelled at War Story and its ilk, it would be that there is no obvious conclusion, no great struggle to a climactic apocalypse, but then anyone who has read about the facts of World War 1 in any detail will realise that this was the nature of that war.
Read, enjoy! If you can find a copy!