It's hard for children's authors to be accepted when they try to write adult books. J.K. Rowling is the exception because people are so eager to read anything by her but it took Judy Blume three or four tries before she had a success.
To assert in any case that a man must be absolutely cut off from society because he is absolutely evil amounts to saying that society is absolutely good and no-one in his right mind will believe this today.
