Good hand-mucking information is scarce.
George Joseph published a book called Handmucking: The Art of Switching Cards in Play, but the production qualities weren't the best and some of the mucks are pseudo-mucks that he invented, not actual switches from the card table. (I personally have no problem with pseudo-mucks as long as they're done well, but I thought I'd mention it in case you made a distinction.)
Giorgio's DVDs as previously mentioned are excellent from an information standpoint, though one wishes he'd been filmed doing these moves 20 years ago.
Forte's Gambling Protection Series is top notch, but not yet available on DVD. Soon...
Until then, his two books Casino Game Protection and Poker Protection are invaluable resources for those interested in gambling information. I know of no comparable source anywhere.
Richard Turner's The Cheat DVD is also excellent and covers dozens of moves. Some are easy, some fiendishly difficult, but all are well-shot and properly performed for the most part.