You're tired. You just want to relax with something dear and familiar. What book do you pick up?
I have several beloved favorites that I go back to again and again over the years when I just need to read something I know I'll like. Some of them are great literature, some most definitely are not. They don't have to be, not when I want a book that I'll sigh and snuggle into for a time.
In no particular order:
The Forever War by Joe Haldeman
"A Mixture of Frailties" or "World of Wonders" by Robertson Davies -- great brain food
One of the Narnia books.
Lord of the Rings, of course, the book I'd choose if I were stranded on a desert island.
The Godfather by Mario Puzo
Almost anything Heinlein wrote in the 40s or 50s
Rendezvous with Rama by Arthur Clarke. God, I wish I could go to that world.
Gaudy Night by Dorothy Sayers (or any of the Lord Peter Wimsey mysteries, really, but this is my favorite)
Cards on the Table by Agatha Christie: she wrote hundreds of mysteries but this is the one I love to reread.
I suspect the Steig Larsson books and the Twilight books are insinuating their way onto that short list of books I go for comfort.
Some of these books I'd be happy to rave about, others I'd grin sheepishly and say, oh well. I know there's a few others that belong on this list that I'll think of as soon as I click "Submit." One more that amuses me, and will tell you more than you want to know about me: Rapid Development by Steve McConnell. Not a novel, a book about software development. But he starts each chapter with an amusing case study of how to do it wrong and concludes each chapter with a case study of how to do it right. I love reading those case studies, even though I haven't done any computer programming for years!
In fact a lot of my "comfort" books are about people doing things well. The Davies books are about the careers of an opera singer and a magician, Heinlein's characters are all super-capable. Even The Godfather is about someone doing something well -- just not something I approve of.
So, what do you turn to for comfort reading?