As far as simple book test goes-this one has two built in, every page is different, the use of a
riffle selection is very fair.
Its not completely Question or fishing free, so there is a
minor question (yes/no) required but its discussed in the book.
You basically get a map
book, they select any page with a map, plop their finger down on ANY street and you predict it.
It can be repeated with a new street selected too, the book stands up to causal inspections.
It's fairly priced as other gimmicked books cost more.