  This a book is for those who would like to learn something about special and
general relativity beyond the usual textbooks, about quantum field theory, the
elegant Fock-Schwinger-Stueckelberg proper time formalism, the elegant
description of geometry by means of Clifford algebra, about the fascinating
possibilities the latter algebra offers in reformulating the existing physical
theories, and quantizing them in a natural way. It is shown how Clifford
algebra provides much more: it provides room for new physics, with the
prospects of resolving certain long standing puzzles. The theory of branes and
the idea of how a 3-brane might represent our world is discussed in detail.
Much attention is paid to the elegant geometric theory of branes which employs
the infinite dimensional space of functions describing branes. Clifford algebra
is generalized to the infinite dimensional spaces. In short, this is a book for
anybody who would like to explore how the ``theory of everything'' might
possibly be formulated. The theory that would describe all the known phenomena,
could not be formulated without taking into account ``all'' the theoretical
tools which are available. Foundations of those tools and their functional
interrelations are described in the book.
