What's the best contemporary, English language, fiction book that you have read?

I have to go with “I Know This Much Is True”, by Wally Lamb.
The story of identical twin boys raised by their mother and a gruff stepfather. One twin is institutionalized (mental) during their first year of college, leaving the remaining twin with the burdens of: caring for his brother; guilt over being the ‘sane’ one; and fear of being overtaken by insanity.
Rich, complex story that’s disarmingly easy to read. I probably read the book 5–6 times before I fully understood how complex the story is. Then read it another 3–4 times just to enjoy the full story.

Please give the author.
Brief synopsis (summary) – or just tell us what it’s about (no ending spoilers!).
Why the book pleased you.

This is not intended to be a ‘high-brow’ question. It’s for people who like to read fiction books. Nabokov to Evanovich. Kesey to (Spencer’s) Parker. I treasure books that take me out of myself and make me wish/want to stay abed all day!