hmmm a good medium for me is comic books. I love reading them, but they make me fall asleep super fast, whereas a book is much harder to fall asleep to.
Hmmm...I haven't been reading much fiction in the last couple of years but that is a particularly tricky request. Good but not too good?
Kurt Vonnegut? He is always insightful and entertaining but never has a particularly strong narrative drive so you don't get a "what will happen next" urge.
The Lindsey Davis Falco novels are always good light reading but can be difficult to put down.
Asimov's Foundation series are all quite episodic so there are plenty of natural breaks at which to stop.
Have a Merry Christmas!!