When were you last carried away by a book?

Sometimes books and stories carry you away, so you're almost not reading about events and characters, just experiencing them alongside the people, part of the world and the story. The characters become completely real and, even if they're people you know you could never meet, you become completely invested in their trials. I guess these books aren't the fastest reads, but then, life usually isn't fast. But they're the deepest reads, the ones that stick in the mind when the last page is turned...