Vundun literature and workbooks?

I do not know anybody who has been in the Vundun circles, but I have a strong interest in finding out more about it in reference to working with spirits... for ideas and applications and the like. I am fairly certain that I can summarize it up as being talisman + trance-state invocation + object containment + et cetera... but I was hoping that I could find a good piece of literature on the subject. Any occultists or 'pagan's out there please help guide my focus. There is always Amazon of course... but hey, I thought I'd try first. (Vundun = Voodoo, for those who do not know)