First printing, 1982.
On cover it reads, "First mass-market edition of the SF trade bestseller"
Here's another cool thing: it actually has pictures strewn throughout the book! Full-page art all over the place! I am pretty shocked, I haven't seen that in a normal serious novel before. Annotated books, yes, sometime a couple picture, yes, but this has it all over the place. For 1982, this is a really great looking sci fi book.
Oh yeah, haven't read it so I can't tell you if it's any good. I give it an A for presentation, though. It's late, I will stop rambling.