George Kotzioulas was not only a writer but also an important critic. The first volume of his critiques, titled "The Immunity of the Spirit," contains general and specific critical notes: essays and studies on topics that concerned modern Greek criticism, articles on theoretical problems and literary issues, supplements, critical chronicles, and comments on cultural and political events of his time.

These critiques, which approach individuals and issues through his own perspective, provide information and interpretations, often unknown, contributing to a different approach to the intellectual pursuits of his generation.

In these works, Kotzioulas, with his eloquent and authentic writing, deposits his philological and literary opinions as a legacy to the specialists, his knowledge, and his persuasive speech to everyone.