 The two became friends and eventually he published Tierney's Cthulhu Mythos novel "The House of the Toad" (1993).Philip's brother, Glenn Rahman, urged Tierney to collaborate with him on "The Gardens of Lucullus" which eventually appeared in 2001.Tierney has collaborated on short fiction with authors including Laurence J. Cornford, Robert M. Price and Glenn Arthur Rahmann.