Therin of Andor wrote:
It's funny. I can so readily recall, when "Spock's World" was announced: it sounded like it was a once-only hardcover event; a "coming of age" for Star Trek tie-ins in novel form - and no one ever dreamed that it would even be offered in MMPB a year later.
Pretty much any novel that sells well in hardcover will come out in paperback eventually, and it usually takes a year or so. I don't remember thinking in 1988 that Spock's World would be any different.