A wonderful tool for the mind reader, you will wonder how you managed without it!
One example of the many possible routines with this book...
A volunteer is asked to stop you at a random page as you flick through the book. They then look at the page number and remember it. This is repeated with 2 more volunteers. They are all thinking of different numbers. You ask them to stand and you point to each volunteer in turn and name a number and say 'If I correctly named your number will you please sit down now' The 3 volunteers sitting down simultaneously is an instant cue for thunderous applause!
This cleverly designed book will allow you to force up to 4 different numbers and you will know who has which number.
There are many more possible routines with this well produced book.