What are some examples of authors who were successful in multiple genres? I can think of some who've gone on to write non-fiction books (usually about writing, such as stephen king, ray bradbury and anne lammot etc.), but I'm particularly interested in authors who managed to escape being pigeonholed into one category. Unsuccessful ones would kind of be interesting to know too, if the book was good - though sold poorly. I suppose there are some who used pen names to, so any suggestions I can check out would be appreciated and hopefully inspiring.