Darwin Ortiz at the Card Table by Darwin Ortiz
From Darwin's Introduction: "If I had to summarize the material in this book I would have to say that it is professional magic, it is strong magic...The term 'audience-tested' is often used, and sometimes abused, in the literature of magic. The effects in this book have been audience-tested, not over a period of weeks of months, but over years of constant use before paying audiences, the only way one can really come to know an effect."