Have you ever considered making your 'Escorial' monographs available in a 'collected' form?
I bought a copy of your 'Gray Code' monograph several years ago and found it to be an excellent investment.
In addition, can you advise whether the following list of 'Escorial' monographs is complete:
*White Line Problem
*Marlo on Faked Decks
*Cards Up The Sleeve
*Hofzinser & 19th Century Card Magic
*Culling & Stocking
*The Discovery of a Card in Some Object
*The Card Effects of Robert-Houdin
*Vernon Lectures in Germany