The Theory of Matrix series of books offers the exiting developments in cosmological theory. We combine elements of psychology, cosmology, and astrophysics to discover secrets hidden deep in the Universe. 'Black Holes' is the 5th book of the series. In this book, we summarise the general part of the Theory of Matrix related to the black holes and the multimodal systems holding them. Stay well, and enjoy your reading. Yours sincerely, Audrey E. Randles28.07.2020