Well, Henry Tudor WOULD invade and manage to win at Bosworth, so he had to reap the consequences. Being king was not a doddle for him, and he became suspicious and neurotic to the point that it quite curdled him. He always feared 'pretenders' who would come to do to him what he'd done to Richard III. Perkin Warbeck was one such, and his story is intriguing. Was he or wasn't he the younger of the Princes in the Tower? The consensus is not, but there is always an element of doubt. We will never know now, but reading about it is engrossing. One will always make up one's own mind in the end. This is a good read. Recommended.