The first three volumes, by Stephen Minch, contain tricks. The fourth, in the same format, is biography only. When they began the project, they promised enough material for six volumes of tricks. That appears to have been an overestimate. I've asked Stephen about future volumes, but am still not sure if their non-appearance is because of his own publishing schedule or just because of a lack of additional material that measures up to the first three. Note to Youell: I loved the first three and they are worth seeking out.