The books behind the videos, and the one I'm writing.

The full wartime test reports from the videos, annotated and illustrated. Paperback and Kindle on Amazon, PDF on Gumroad.
Look insideThe Royal Navy test pilot who flew more captured German aircraft than anyone. For the Fw 190 videos.
On AmazonJG 2 and JG 26 over the Channel, including Faber's landing at Pembrey.
On AmazonThe reference on every Spitfire mark, including the Mk IX that answered the Fw 190.
On AmazonShort PDF companions to individual videos. See them on Gumroad.