A plan for a library with a storage level in the shape of a flat spiral is presented. The advantages of such a plan include: space saving, easy expansion of the building, an unbroken sequence of shelving, quick access to all books and freedom in the design of the library's other sectors. This plan is especially suited for the research library because this is where it is more important that books are preserved from damage or loss, that there is room for any increase in their numbers, that they are recorded under whatever heading they are sought, and that they are unerringly located and retrieved. Following a description of the working model is a discussion of such topics as: need for closed access, arrangement by size, undisturbed sequence, area accessibility, expandability, internal appearance, and superstructure. (NH)