Alain Perez Beyond Salsa
 

I saw this page about an instructional video/book by Alain Perez for advanced latin bass.Here's the link

http://www.latinpulsemusic.com/albums/show/421

Seems interesting and quite challenging for a gringo like me.
It's supposed to be the first of a series of 4 but it's called vol 6.
That confuses me.What are the other volumes before?
I'm currently working on Stagnaros latin bass book and also Funkifying the Clave.From what I can tell I will need to go through those books before I can take the next step.
Still,I'm curious.Does anybody here have this course already?