I don't have HBO, so I can't watch the show. I will say that the program is based on a novel written by my favorite contemporary author, Tom Perrotta. (I've met him a couple times, so that makes us close, personal friends, right?) Perrotta is also heavily involved with the show, although I'm sure Lindelof is the Head Cheese.
I would urge everyone to check out the original The Leftovers book as well as Perrotta's earlier efforts:
Election: a great allegory on the 1992 election. Later made into a STELLAR film starring Matthew Broderick and Reese Witherspoon.
Joe College: An absolutely hilarious and touching coming-of-age novel about a young man named Danny, a lower-middle class kid who is attending Yale...while causing himself a lot of personal problems.
The Wishbones: A 35-year-old wedding band guitarist has been dating his girlfriend for 15 years. An elderly colleague dies during a wedding band showcase and the protagonist stumbles home in a daze...and unintentionally asks the woman to marry him. Through the rest of the novel, he learns what he wants in life and love. Also hilarious.
Bad Haircut: A collection of the gentleman's stories. Fun and meaningful.
Little Children: A dark look at suburbia. Made into a film with Kate Winslet. You'll recall the washing machine scene.
The Abstinence Teacher: Perrotta enjoys examining suburbia. This time, it's a woman who is a dealing with a wave of Puritanism infecting her town.
Honestly, Perrotta is great because he's "literary" (meaning the books are "good" and well-written and acclaimed), but they're also a ton of fun. Some "literary" books are really hard to read and...well...boring. These are not. =)