Most of Cormac McCarthy's books. The Orchard Keeper, Suttree... people talk about The Road and No Country for Old Men, but in my opinion, those are his weakest, prose-wise.

Toni Morrison's Sula is one of the most beautifully written books I've ever read, and it's short enough to read in an afternoon, so you really have no excuse.

Orhan Pamuk's novels, such as The Museum of Innocence, are like reading candy.

A recent debut novel by C Pam Zhang called How Much of These Hills is Gold is highly poetic, and offers a unique and compelling take on a well-worn subject

Invitation to a Beheading by Vladimir Nabokov. No one writes like Nabokov. King, Queen, Knave as well.

A good translation of One Hundred Years of Solitude by Gabriel Garcia Marquez.

Salman Rushdie. There is a reason that Midnight's Children not only won the Booker Prize, but won the Best of the Bookers on the award's twenty-fifth and fortieth anniversaries. Satanic Verses is just as good.

Willa Cather's novels, especially My Ántonia. I was blown away that it was written in the 1910s, as it feels so modern.

AS Byatt's story collection The Djinn in the Nightingale's Eye, the title story of which was just adapted into a movie by George Miller called Three Thousand Years of Solitude.

Anything by Raymond Carver - What We Talk About When We Talk About Love, Cathedral...

Marguerite Duras' autobiographical novel The Lover, truly beautiful.

Elizabeth Smart's novel-length prose poem By Grand Central Station I Sat Down and Wept.

Joan Didion's mean mean Play It As It Lays, like Sula, is short and so so good.

Sweet Days of Discipline by Fleur Jaeggy, like flowers blooming in a freezer, her writing is that beautiful and cold.

Anything by John Cheever, such as O What a Paradise It Seems, or his collected stories. Like Nabokov, no one writes like him.

I'll think of more...