This book investigates the fundamental question of whether consciousness can be quantified through an objective, physical measure. Authors Giulio Tononi and Marcello Massimini, both prominent researchers in the field of neuroscience, present a framework rooted in Integrated Information Theory (IIT). They argue that consciousness is not merely a biological byproduct but a measurable property of physical systems that integrate information, providing a mathematical basis for assessing the capacity for experience in both humans and machines.

Experts recognize this work as a primary technical resource for understanding the quantitative approach to consciousness. Readers frequently note the academic density of the prose, which requires a foundational understanding of neuroscience and information theory to fully grasp the proposed metrics.