That Which Is discusses a split in society, with one side struggling to maintain personal autonomy, the other determined to eradicate individuality. The book explores sense of self through God, mind, body, wealth, love, etc and advises readers on how to find their true Self. That Which Is by Alfred Aiken. Published by Hillier Press in 1971. PP. 240. Hardback- condition: poor, creasing and discolouration to the spine, damage to the corners of the hardcover, pen and highlighter used throughout the book, otherwise all text inside is visible and bright.