This is a re-print of one of Corinda's 13 steps to mentalism -- the step on billets and billet switches.  If you have Corinda's complete book of steps, you don't need this booklet, but if you are new to mentalism, or experienced, but have not been able to get Corinda's book, here is an important chapter -- perhaps the most important one, as it gives you the ability to do impressive mind reading effects with no props or preparations.  That is how valuable the knowledge of billet switches is to any mentalist!