I clipped an article a few weeks ago about this guy, and without making the mental connection, stumbled on one of his books at Barnes and Noble and picked it up.  David Fulmer has written three novels featuring turn of the century Storyville detective Valentin St. Cyr, and includes some of the early jazz figures such as Jelly Roll Morton and Buddy Bolden. I'm in the middle of two other books right now, but should be done with both by the end of the week, so I'll post more as I get into this.  For the time being, check out the article on Jazz News, or pick up a copy for yourself.