I received this with "Booked" and "Glance" and it gets more use than the other two combined.
In the ad it states "Any" book. And this is true, until you perform.
It can be any book, but
if it has to be "any book" in performance, you may need to get more copies of this. Fortunately, it
is less expensive than many book tests already.
I use Neil Gaiman's "The Book of Magic" for
this, and it flies SO WELL!
Gaiman's writing. use of incredibly detailed words, and the
imagery make for a captivating prop.
And they can pick any word, describe any picture, or
any information from the book; and You will Know It.
So in the sense of performance, the
only negative I have is that I did not buy many more.
Once you have selected your "any" book,
it is rock solid for that book.
And if you are interested in BT's and do not want to enter
in the 150$-300$ range, this is an excellent start.
LokI
He's basically saying that there is a gimmick at play, and that the gimmick can only be used for one book. So if you want to have many books to offer your spectator a free choice, you would need multiple gimmicks.