This book investigates whether the surgical severing of the corpus callosum results in the existence of two distinct minds within a single human being. Elizabeth Schechter, a philosopher specializing in the philosophy of mind and cognitive science, utilizes clinical data from split-brain patients to challenge traditional notions of personal identity. She argues that while these individuals possess two separate centers of consciousness and intentional agency, they remain a single, unified human subject.

Experts in philosophy of mind recognize this work as a rigorous contribution to the debate on personal identity and the nature of the self. Readers frequently note the academic density of the prose, which requires a foundational understanding of cognitive science and philosophical terminology.