Are you tired that your eyes want to shut down? Still, you would like to read a little bit? The Tell-Tale Heart by E.A. Poe is a delightful short story for just this purpose.
The confession of a murderer and the story behind his actions, the whole preparation phase but also the twists in this account are truly remarkable - I was surprised that this is possible in so few pages.
While reading, I usually want to reach the end and know what happened there - not in this case, there never was a moment of quite and relaxation. I was so hooked on the plot developping, I just focused on reading and getting to the next twist...
This was such great writing that it doesn't need a longer text!