I have yet to read this one, but I look forward to getting into it soon (once I finally finish the Dark Tower Book 8, which I have decided to just get from the library after all.) Written for his then 13 year old daughter, The Eyes of the Dragon was first published in 1987. More of a fairy tale than a horror story (at least as far as I understand, having not yet read it) I believe the story does have some connection to the world of The Dark Tower.
I think I paid three bucks for this at the goodwill, because it's a hardcover.
That's all I have to say about the book, since I haven't read it, except maybe 'Yay dragons!' because dragons are pretty nifty.