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Yes, that was Mastermind.

Those other series, not by M.C. Millman, were indeed all part of the same “canon” (not the same one as those 2 Millman books).

By the way, just to clarify, the bold lines in the original post were written by me, not a mod. (I think a mod would usually add

“EDIT:” in bold before an addition to a post.)

Usually not. KVT.