Hi Claus,
Aside from the books...
If it's at all possible for you to come to London for a day or two, I can highly recommend the Mosquito air museum near London Colney, home of De Havilland.
Mosquito Aircraft Museum - de Havilland Aircraft Heritage Centre
It has a nice range of aircraft, Mosquito prototype, engines, original Comet cockpit simulator, and plenty of people to talk to.
Andoni