Floating bookshelves, these are bookshelves I like. Looks like you could do this with an IKEA kitchen wall cabinet minus door and turned horizontal to mount. IDEA for narrow wall next to our kitchen wall
If you want extra storage, a raised bed is the way to go. But finding the right organizer to place your mattress on top is another story. Here, nine sturdy IKEA kitchen cabinets with doors hide personal items.