I haven't read a Stephen King novel in ages, nor have I read or followed any of his seven book series, The Dark Tower, but I just found out that he used the number 19 to tie in characters and events and the number 19 is the mysterious key number in the Dark Tower saga.
http://www.google.com/search?hl=en&q=number+19+dark+tower&btnG=Google+Search&aq=f&oq=
Just thought I'd like to share that off-topic information with you all ;)
peace