Dr. Benjamin shares all of his secrets of doing mental math faster than a calculator in hisMathemagicscourse. The course consists of three DVDs and an audio disk， along with an autographed copy of his book，Secrets of Mental Math： The Mathemagician’s Guide to Lightning Calculation and Amazing Math Tricks. (The book is co-written with Michael Shermer and has a foreword by Bill Nye， the Science Guy.) The cost of the course is $49 (or $39 without the book) plus tax， shipping， and handling. Credit card and Paypal orders are accepted.