Clash of Eagles by Anthony Saunders features P-51 Mustangs of the 20th FG in combat with Me109s.

In the open skies high over occupied Europe, P-51 Mustangs of the 20th Fighter Group, flying out of Kings Cliffe, engage Me109s from JG77 in a furiously contested dogfight. Below them a formation of B-17s from the 379th Bomb Group fly through the chaos, doggedly maintaining their course, as they head on to attack the huge synthetic oil refinery at Meresburg, southern Germany, on 11 September 1944.

So vital was this refinery to the Nazi war machine that it became one of the most heavily defended targets in Germany, the air defences even surpassing those of Berlin. As a consequence it was one of the most feared targets for the heroic crews of the Eighth Air Force. 

Each copy of Anthony Saunders' Limited Edition, Clash of Eagles, is signed by a P-51 Ace and a veteran Luftwaffe pilot:
Lt. Colonel Clyde East
Oberleutnant Kurt Schulze.