Which Science Fiction Or Fantasy Book Do You Wish Went On Forever?

We've all experienced the sense of impending loss that comes when you realize a book is almost over — and you're not ready for it to end. But which science fiction or fantasy novel do you wish would just never end? So you could keep reading it for the rest of your life?

Please include a book cover (or other picture) for your chosen book or book series. And please mention the title, the author, and why you wished it would just never stop. Thanks!

Top image: Ursula K. Le Guin's Earthsea, art by oceanleaves. The Earthsea books have such a wonderful grasp of magic and adventure, they could go on ten times as long and it wouldn't be enough.