George W. Carey supplied the chemistry and the biblical reading; Inez Eudora Perry supplied the astrology, and the join between the two is what makes God-Man: The Word Made Flesh a complete system rather than two separate ideas printed under one cover. Her specific contribution matched each of the twelve zodiac signs to one of Wilhelm Schuessler's twelve tissue salts, giving the system a wheel that could, in principle, be read in either direction: from a person's sign to the salt their body was held to need, or from a salt's scriptural code name back to the sign that governed it.
The two ran the Carey-Perry School of the Chemistry of Life together to teach the combined system, and the partnership lasted until Carey's death in 1924, four years after their joint book appeared. What is easy to miss, reading only the founding text, is that Perry was not a junior collaborator who stepped back afterward. She continued publishing astrological and biochemic material under her own name for decades afterward, into the late 1940s, keeping the system alive for a period roughly three times as long as the original partnership had lasted.
Her later solo work, including An Esoteric Analysis and Synthesis of the Zodiacal Signs and Their Physiochemical Allocation (1932), develops the astrological half of the system in more technical detail than the founding book attempts, without departing from its basic premise: that the zodiac and the body's own chemistry are two descriptions of the same underlying reality.