Hein was a close associate of Martin Gardner and his work was frequently featured in Gardner's Mathematical Games column in Scientific American. At the age of 95, Gardner wrote his autobiography and titled it Undiluted Hocus-Pocus. Both the title and the dedication of this book come from one of Hein's grooks.
hein was a close associate of martin gardner and his work was frequently featured in gardner's mathematical games column in scientific american at the age of 95 gardner wrote his autobiography and titled it undiluted hocus-pocus both the title and the dedication of this book come from one of hein's grooks