Volume two has the bill switch with a thumb tip. If you know how to make a silk vanish, you can do
the rest of the effects in the series. You don't learn any amazing routines, patter, or handling
that you wouldn't develop on your own in front of a mirror for a half an hour.
Volume one
seems like it should be a giveaway when you buy a thumb tip, volume two is worth a bit more for the
bill switch.
I'd stick to volume two, if anything.