Parma Eldalamberon 18: Tengwesta Qenderinwa & Pre-Fëanorian Alphabets, Part 2:

Parma Eldalamberon 18 presents previously unpublished writings by J. R. R. Tolkien concerning his Elvish languages and early versions of his invented scripts. These have been edited and annotated by Christopher Gilson, Arden R. Smith and Patrick H. Wynne, under the guidance of Christopher Tolkien and with the permission of the Tolkien Estate. The Tengwesta Qenderinwa is a grammar of the Primitive Quendian language, which Tolkien imagined to be the common ancestor of the various Elven-tongue...