String - a Swedish, smart, adjustable and flexible bookshelf! Certain things are so closely associated with a particular time that they become timeless. There is no better example of this than the String shelf system designed by Nisse Strinning in 1949. The shelves are easy to assemble. Each shelf can be quickly relocated. Shelves of different depths can be combined and the framing functions a book-end. It is robust and can be extended in any direction.