I've put it into AI which says possibly but maybe not! I think it will but have an 'anything is possible' mindset, which doesn't always work 😂.
Stairs are straight up from the hallway with a 90 degree bend at the top. Stair width 88cm - ceiling height at lowest 187cm (top of first flight, this bookcase is going to the first floor). Width where the newel post is is 84cm.
Dimensions of bookcase H182 x W89 x D33cm.
In my mind it will come up sideways so the 33cm width up the 88cm stairs and then be moved sideways around the gap of 84cm where the newel post is.
Appreciate the height is tight at the top. Am I missing something?