If you're looking for a practical, reliable and undetectable tool for secretly reading what your spectators have written... You're looking for the Hpad.
Months of design and development have gone in to ensuring that the Hpad meets the needs and expectations of modern mentalists. The Hpad comes as a full set that includes a DVD explaining all the moves you need to know to use the device, as well as two routines - an ACAAN and a magic-square effect.
The gimmicked marker pen has been specially manufactured to make sure that it's very comfortable to use and easy to read. Also supplied is another gimmick that can be fitted to a Sharpie.
The notepad used is made by Rhodia, so it's easy for you to refill yourself - simply buy a refill pack from a stationary store or Amazon.