cuddle up
(to someone or something) and cuddle up (with someone) to nestle or snuggle close to someone or something to get warm or to be intimate. Let's cuddle up to the warmth, near the fireplace. She cuddled up with him and went to sleep.
cuddle up with a (good) book
and curl up (with a (good) book)to snuggle into a chair or bed comfortably to read a book. I want to go home and cuddle up with a good book. She went home and curled up with a good book.
cuddle up
(with someone) Go to cuddle up (to someone or something).