 It collected Tarbell's widely scattered and previously uncollected writings on magic, which Kaufman then fashioned into something resembling the first six volumes of the course.Since most of the book was written and illustrated by Tarbell, it is linked more closely to the rest of the course than Volume 7.Publishers T. Grant Cooke and Walter A. Jordan hoped to produce a correspondence course in magic in the mid-1920s and approached Harlan Tarbell and Walter Baker to work on the project.