Osterlind Mysteries always provides value in their offerings. This is no exception. It details how to construct the Dynamo Deck using a regular deck of playing cards. That, in itself, is a $25 value. Richard then proceeds to teach numerous effects using the deck. There are also other excellent mentalism effects included. With little more than a deck of cards, paper and a few other items, you could be ready to do do an impromptu hour long show at any time. Highly recommended.