Brain-Wack by Tony Jackson

'Brain-Wack' is an amazing prediction using Zener cards; two versions are taught.
'Brain-Bender' is included as a bonus and serves as a completely different approach to the impromptu invisible deck.
*Although any set of ESP cards will be suitable to perform this effect, Offason's 'Anglo ESP Deck' is especially recommended and is also available here on Penguin.