The Hidden Work is a book by E.J. Gold that outlines a spiritual practice called "The Work," which aims to awaken the "biological machine" within each individual and use it to help the Absolute, who Gold views as suffering from the involuntary creation of the universe.

Gold argues that true prayer is not the emotional, self-serving kind practiced by many, but rather a specific, intentional process called "Prayer-Absolute" that involves a series of contemplations and helps to transform the individual's being. The book includes chapters on the history of prayer, the nature of the Absolute and the role of angels, as well as practical exercises and dietary guidelines for those who wish to engage in "The Work."

The book is structured as a textbook and is written in a straightforward, contemporary style.