I looked long anded hard to find tall, wood bookcases (5 shelves, about 72 inches) that would fit in the 18 inch space I had between my desk and the walls in my new office. Wayfair had tall, narrow shelves that were 17 3/4 inches wide - just right. They turned out to be a decent price, were easy to put together with just an electric screwdriver, and THEY FIT PERFECTLY! They are heavy ( I think the box weighed 300 pounds) so they are not tippy at all. I even had a choice of finishes and found one that matched my desk. I am a happy camper!

Pros: Just the right size, good value, easy to put together
Cons: Had to remove each piece from the packing box before taking it upstairs to assemble.