Here are some of my favourite images:
This alcove seating area looks like the perfect reading nook. The lamps would provide extra reading light in the otherwise quite dark space. I like the modular shelving they've used which contrasts the very orderly design of the arch way. The arch has been created out of wood so it's easily added to a rectangle cut out with out too much work.
This one I found here. I like how the shelving is off the floor and a small side table has been used. This frees up more floor space and can make the room feel bigger.
Thank you for reading.