This effect, with copious notes, suggestions, ideas are quite overwhelming it seems....90 pages is s
chunk! But so simple, and insightful.
It is definitely a trick(s) for the experienced
performer.
While I see elements of the Monty Hall Problem manifested in this trick, it is
far more comprehensive with the alternative presentations from Murray, especially.
While
versions of this trick can be done in a large group or a parlor group or a dinner table, or online,
it is effective....
It can be used with objects, cards, etc.
I actually combine
Monty with a version of this routine
Really smart guys, deserving of study and proper
execution.