Set of limited edition modules sold only to members of TSR's RPGA role-playing network.
I12: Egg of the Phoenix is a rewritten collation of R1 - R4 of Frank Mentzer's RPGA series of modules, the individual adventures were published as R1: To the Aid of Falx, R2: The Investigation of Hydell, R3: The Egg of the Phoenix, and R4: Doc's Island.
R5 - The Great Bugbear Hunt, first used at GEN CON South Game Fair in February 1982 was published in Polyhedron (Issue 28 - Vol. 6, No. 1).