Another use of coat hangers

When I arranged my home office I had two wooden bookshelves and three metal bookshelves. The wooden ones were closed end to end, but the metal ones were like a skeleton of shelves plus 4 columns in the corners. So books needed something to hold them or else would fall So I 'threaded' coat hangers throw the column holes (in a similar way like shoe laces). This not only kept books within, but added rigidity to the bookshelves.