I think the first two are dated November, 1977. The rest came out over the next year. Most of the first 6 were reprinted once, in 1979. By 1980, they were all gone from US bookstores.
The last big hurrah in that venue was the adaptation of The Motion Picture. True The Wrath of Khan was also released, but in greyscale?! I suspect that cost cutting scheme pretty much killed the line. Plus, by the mid 80s, affordably priced VCRs had hit the market and Paramount licensed the sale of episodes. That probably drove the final nail into the coffin. Speaking of The Wrath of Khan, that was the first movie to finally break the 80 dollar price tag normally slapped onto VHS movie sales, slashing it in half, just under 40 bucks.