Skulls in the Stars on Nostr: Return to White Plume Mountain was one of a series of adventures commissioned for the ...

Return to White Plume Mountain was one of a series of adventures commissioned for the 25th anniversary of D&D in 1999. (They also probably represented an attempt to revive the company's flagging fortunes.) Another example is Return to the Tomb of Horrors (1998), also by Cordell.