I would do that

WHAT CAN I DO

It's straightforward and highly visual

Even the pen is optional

Echo Book Test | Vincent Hedan (Tarot de Marseille) Mago; De Matos I would do thatThe Echo book test is a project I kept secret for the last few years I use Echo when I want a personal impact; when I want an easy, foolproof book test; and when I want to involve the audience emotionally. But Echo is much more than a simple book test First of all, Echo is a normal book: anyone can read it without suspecting anything, in fact it's available on Amazon. In secret, Echo uses a classic principle by Larry Becker (which he allowed me to use