"If any writer is capable of producing the Great American Zombie Novel, it would have to be Stephen King…Cell is hard to put down once you've picked it up. There is no shortage of harrowing scenes…A solid, entertaining read."
I don't know quite how to take this "solid", as applied to a novel. My first thought was that it is one of those 600-page efforts that have the shape and weight of a brick. To me it doesn't sound all that inviting or exciting.
Still, I found this in an American dictionary:
3f. Slang Excellent; first-rate. American Heritage® Dictionary of the English Language