Book of Lemmas is a historical precursor to Critical Metaphysics of Process. It belongs to an earlier phase in the development of the project and no longer represents the author’s mature metaphysical position. Its concepts, terminology, and arguments were subsequently reconsidered, revised, or abandoned through the work leading to Regulae I-III and, finally, the two volumes of Critical Metaphysics of Process. The book has therefore been retired from circulation and should not be treated as a source for the author’s current philosophy. Critical Metaphysics of Process supersedes it completely and is the authoritative statement of the mature metaphysical system.
The significance of Book of Lemmas is now purely historical : it marks an earlier stage in the genealogy of the project, while the philosophical position itself must be judged exclusively on the basis of the later work.