Neither of these books exists outside the world of Dark Shadows.  A Treatise of White Witches and Study of the Druids' Use of the Supernatural.  From episode 1122.

From The Fifty Gates of Understanding by Aleta Blanche Baker and illustrated by Gibbs Mason, 1930.

From The Book of Life: Vonisa by Sidartha, 1885.

Long before the U.S. military's "remote viewing" program, occultists had perfected the technique.  From A Manual of Occultism by Sepharial, 1914.  See our video about how to accomplish remote viewing at home.

From Hollins College's 1920 yearbook.

From The Fifty Gates of Understanding by Aleta Blanche Baker and illustrated by Gibbs Mason, 1930.

From Secrets of the Supernatural by Herbert Molloy Mason.

From The Mystery and Romance of Astrology by C. J. S. Thompson, 1929.

From the Montana yearbook of 1918.  See How to Hoodoo Hack a Yearbook.

From Wizardry VI: Bane of the Cosmic Forge handbook.

No peaceful dreams that night.  From Spellbound, 1977.  (Courtesy of Archive.org.)

The goat waits in the shadows.  From Swarthmore's 1898 yearbook.  See How to Hoodoo Hack a Yearbook.

From The Fifty Gates of Understanding by Aleta Blanche Baker and illustrated by Gibbs Mason, 1930.

From The Holy Tablets.

From The Book of Life: Vonisa by Sidartha, 1885.

From St. Nicholas, 1913.

From the Xanadu: Dragon Slayer II strategy handbook.

From Taylor's 1977 yearbook.

From The Magical Ritual of the Sanctum Regnum, Interpreted By the Tarot Trumps by Eliphas Lévi, 1896.

From Dark Shadows episode 1123.