One classic: The Revolt of the Angels, by Anatole France. France is regrettably neglected today, but he produced wonderful, delicately dry, elegantly expressed acidic satires, and is a worthy descendent of Voltaire and Victor Hugo among French writers.
One modern popular thing: Men at Arms, by Terry Pratchett. In many ways a worthy descendant of Kurt Vonnegut and Philip K. Dick.
And a popular true crime book: Green River, Running Red, by the queen of True Crime, Anne Rule. An account of the infamous Green River Killer, Gary Ridgway, that concentrates not only on the long, involved and frustrating hunt for him, but in great detail on his victims, which elevates it far above most True Crime books I've seen. Anne Rule is a very fine writer, regardless of whether or not you like her chosen genre. Her first major book, which got her started on this path, The Stranger Beside Me, is just about a classic now. She was a co-worker with the Seattle area's rival to Ridgway, Ted Bundy, and wrote from a personal viewpoint no one else could possibly have done. Many of the same investigators who worked on the Bundy crimes also worked on the Green River cases, and she had close working relationships with them, which makes the Green River book especially effective.
I'm an eclectic reader, and generally am engaged in two or three books at a time.
caw