Three books set in the same universe.
Each can be read alone, but We Fell Apart and Family of Liars contain spoilers for We Were Liars — so you might want to read that one first.
For the other two, any order is good.
“Without a doubt, a phenomenon….The novels are like the Sinclairs — they’re richer together.”
— New York Times
"Enough secrets and betrayals to populate another Taylor double album.”
— People.com