Outs, Precautions & Challenges for Ambitious Card Workers - Charles H. Hopkins
Teaches how to be ready for any and all emergencies within card magic, especially while performing Ambitious Card routines. This is a must have for all card magicians. With this information in your arsenal you can hardly go wrong no matter what terrible thing unexpectedly befalls you.
Charles Hopkins was a Philadelphia legendary card man. Everyone serious knows that this book is a true must read.