DAW, New York, 1980, 1st pr thus.  ISBN 0-87997-563-6.  DAW’s SF Books No. 402.  MMPB, 272 pages.  Wraps show some edge and cover wear, bit of paper transfer on front wrap and short fore-edge tear, some age toning; binding tight with no discernible reading creases.  Interior clean and unmarked with tanning pages.  Three complete novels in one volume.  ‘Nopalgarth – The nopal came from outer space to take over the brains of humanity – and it took the thinking of another set of alien monsters to prepare a mental Armageddon! * Son of the Tree – The mighty tree of life ruled a world, dominated the sky, and held the power of life and death over millions of worshipers – until Joe Smith came along. * The Houses of Iszm – The best homes in the universe were grown from seeds genetically programmed on the planet Iszm.  The theft of just one such seed would be a prize worth billions!’ (from rear wrap)