Even if the bonus section at the end wasn’t included, this little book would still be well worth picking up by anybody interested in mentalism and/or magic. There are loads of ideas on where and how to use cribs. But it’s the Magic Square section that really makes this book an essential. I’ve been using his version of the magic square for quite some time now, as it has a great advantage over the traditional one. You can compare two (or more) squares made with this method and the process isn’t tipped. I’d never considered using a crib with it though, I’d always gone the mental arithmetic route. Using the crib given in this book though, anybody, no matter how bad at mathematics they are, can easily do it.
This book is an easy five out of five stars, and it’s a really quick read too.