The Phaidon Design Classics contains fascinating articles about nearly 1000 items, in 3 heavy volumes. I would recommend them to anyone who has the slightest interest in why things are the way they are.
The text is concise, but packed with detail, and the contributors clearly have a passion for the objects that they describe. The illustrations are given plenty of space, and the patent application line drawings are particular effective. The choice of entries is wide and varied, but the Editors do seem to have a liking for chairs. There are 180 of them, and that's not including stools, chaises longues, sofas, etc.!
The case looks attractive, and has a useful carrying handle, but satisfies none of the requirements of a classic design, being completely impossible to open.
My son asked "Why not 1000 designs?" Well I suppose there always has to be room for one more. If they are so keen on seating, my vote would be for the most valuable and widely used "Throne" of them all, Thomas Crapper's U-bend flush toilet.