Thieves' World: Thieves' World (1979), Tales from the Vulgar Unicorn (1980), Shadows of Sanctuary (1981), Storm Season (1982), The Face of Chaos (1983), Wings of Omen (1984), The Dead of Winter (1985), Soul of the City (1986), Blood Ties (1986), Aftermath (1987), Uneasy Alliances (1988), Stealers' Sky (1989)
M.Y.T.H. Inc.: Another fine Myth, Myth Conceptions, Myth Directions (1982), Hit or Myth (1983), Mything Persons (1984), Little Myth Marker (1985), M.Y.T.H. Inc Link (1986), Myth-nomers and Im-pervections (1987), M.Y.T.H. Inc in Action, Sweet Myth-tery of Life (1984)
Co-Editor of the Thieves' World anthology and the M.Y.T.H. Series. He tends more towards the comedic fantasy, which is just fine with me.
Unfortunately the beginning of the MYTH series is better than the later books I read, although this does not seem uncommon with long running comedic fantasy series.