I'm between the beginner-intermediate phase, and people have recommended me to read Expert Card Technique. But I went through a small sample of the book, and the sleights seem a bit dated. For example, the get-ready of the DL is to press on the outer and inner edges until the desired number of cards pop up. But riffling the back is much easier and more efficient, and the pinky count is much more efficient and secretive once mastered. And the double loft itself is rather flourishy, and the Derek Dingle double lift is much better if you want a flourishy lift. Or even the push-off double lift that 52Kards teach in YouTube from Stars of Magic is better (by much). So before buying this product, I wanted to check whether the book was truly worth it to buy, since the moves it teaches that I've read are now by far obsolete.