In a room like this I'd stay up way, way, way too late finishing one more chapter in my current read and then pulling random books from the shelf to see what their first lines are, maybe even the first paragraphs, and hey look, it's 2am already. Dangerously delightful.
What a fun and colourful room this is! Clean, simple, bright. There's probably a little desk under the window too.
I think every room should have a wall of shelves like this.