I love this Chair bookcase by Gail Peter Borden I just found today.
Divided into three systems, there is [1] a cockpit chair that has an adjustable angle of repose and uses a compressive slotted connection, [2] a structural frame and cover/cloak that uses a fingered connection, and [3] an infill shelving system that deploys a pegged connection. The 237 books complete the remainder of the composition.This was found on yankodesign store
Check it out here