Health Research Books is a publisher of rare books that explore a range of vistas, including spirituality, science of breath, spirituality, fruitarianism, breathaireanism, natural living, etc.
Two authors of particular interest are Heyward Carington–fruitarian thinker and author of over 100 books on health and psychic phenomena. His Food of Man is quoted by Ehret in the Mucusless Diet Healing System.
Hilton Hotema–fruitarian/breathairian thinker and original 20th century spiritual philosopher. One of his most famous texts is Man’s Higher Consciousness.