David Barreto is a researcher and author specializing in esoteric traditions, with a particular focus on religious and universalist literature, as well as themes in metaphysics. As a passionate advocate for animal rights, David has devoted years to exploring their spiritual nature.

His work encompasses various activities supporting the animal cause, including animal rescues, writing papers on the subject, and delivering lectures.

With a comprehensive background in theosophical and metaphysical studies, David has developed a unique perspective on subjects ranging from astral travel and near-death experiences to meditation and mediumistic channelling. This perspective, coupled with academic courses, has enabled him to bridge spirituality and scientific inquiry. He pursued complementary courses in astrophysics and religious literacy, earning certifications from the Australian National University and Harvard University, respectively.

In 2019, Barreto published his first book, Supernatural Science: Theory and Magic, which navigates the science behind mediumship and psychic phenomena, oracles, ghosts, and witchcraft rituals. In 2021, he released his second book, which was republished in 2023 as Karma & Reincarnation in the Animal Kingdom: The Spiritual Origin of Species, a captivating study on how animal spirits evolve, the processes of their reincarnation, and the spiritual repercussions of eating meat. In 2024, Barreto released two books: One Hundred Messages From Above, a collection of intuitively crafted texts aimed at guiding readers on how to spiritually evolve more rapidly, and The Book of Umbanda, a reference compendium on the largest folk religion in the Americas.

Through his work, David aims to bring spirituality down to earth and illuminate the often-overlooked importance of animal spirituality within esoteric literature and spiritualist circles.

The compensation and royalties received from Barreto's books and other sources are donated to animal shelters, sanctuaries, and charitable organizations. This reflects his commitment to contributing to the animal cause rather than making a profit from it.