After buying the Pdf, I find that it didn't have anything you could not find out about sergals if just look into them at all, I would only show to people new to sergals {or SL players do to they don't know a thing about them.} and even then you could find all about it from other sources. I would like to ask the Book makers to add more to this Pdf in all fields. it was only 3$'s but that lack of anything really useful was disappointing.