I enjoyed
The Red Queen as well. While she's far less sympathetic, it's interesting nonetheless.
Shakespeare described him as a hunchback, but his crooked spine was more indicative of scoliosis. Regardless of semantics, the fact that he wouldn't have been physically attractive is undeniable. Still, even if he were a hottie and she discounted the rumor about him killing her younger brothers as is the case in Gregory's scenario, he was DEFINITELY the man who executed her half-brother and uncle. There is nothing sexy about that!
It may be improbable, but there was a real instance of a man who claimed to be that surviving second son and even led several uprisings in the name of York after Henry Tudor took the throne. While his claim is largely discounted by historians, Gregory is treating it as truth.
http://en.wikipedia.org/wiki/Perkin_Warbeck
Personally, my money's on Richard III having killed both boys, but we'll probably never know.