☰ mtdb > Tricks > Trick< Back to all tricksOpus Book Test Permalink: mtdb.co/?OpusBookTest Creator: Denis Marc Paret The Opus Book Test introduces a brand new method for book tests. It allows for a completely hands off presentation, no fishing and no forcing. Denis Marc Paret has created an ingenious way of divining which word the spectator is thinking of. It uses an “Intelligent Marker”. With this incredible... Buy From: REVIEWS No Reviews Yet. about | login | register | dealers | tricks | creators | contact |