I enjoy Luke's work a lot. I find that even the pieces that rely on suggestion, as many do in 7 Deceptions and Building Blocks, are quite workable given the proper attention by the performer.
I think one must consider their audience when getting into Luke's work. His work ranges from very commercial (in this case I'm using the term to denote the range of performers who will find a home for the material) to very narrow.
I'd recommend you pick up Skullduggery with any of the books you purchase for two reasons: 1) When you read some of the more offbeat stuff, your first thoughts will be similar to "Yeah right, that'd never work." It helps that you get to see it work. 2) On top of seeing it work, watching Luke will give you an idea of WHY it works.
7 Deceptions is a good starting point to introduce yourself to Luke's work.
Good luck!