Plot: Is there a homeowner out there who doesn't yearn for more shelf space for his books and display items, says Norm at the beginning of The Library System program, which concludes the 17th season of New Yankee Workshop projects. Recognizing the need for a good bookcase design that can be used in any suitable room and added to as needed to fill out a wall of books leads Norm to design a modular system that can be adjusted to go around existing windows or doors