I couldn't find any good books about the guy. I became interested on the tragic story of Charles Edward after watching a documentary about him. I want to read more details about him.
To anyone who doesnt know who he is, he was the grandson of Queen Victoria. A nice English man forcefully torn away from his home just fill the empty seat of dukedom of saxe-coburg gotha in Germany and was soon stripped off his British peerage and rights when WWI broke out
He was then ostracized by the British aristocracy. He was shunned, or rather disowned by the British royals. He joined the Nazi party out of fear from property takeover from the the communists.