The Last Question, one of Asimov's best, is now available in a free anthology online. I have not seen one like it before or since, and it truly displays SF as a literature of ideas. How can entropy be reversed?
Read of the Day
The Ghost Fleet is from The Trouble With Aliens, a collection of Christopher Anvil's stories about alien conflict. This is from a series called The War With The Outs, the Outs being a human-like race with incredible powers of persuasion. Mostly pretty forgettable, this one is 2 stars.