Thanks for the link, BTW I found a couple of books at the local music store, these are trombone books written by Jim Snidero, and they are put out by
www.AdvancedMusic.com, very cool, they come with a CD, I am using it for sight reading, they are very easy but yet not the kind of phrasing we would use on bass, very cool trying to play it without figuring out fingering.