"Virtual Brain: ChatGPT" e-book comprehensively covers all the details and usage methods of ChatGPT. The book explains what ChatGPT is, how it works, and in which applications it can be used. It also demonstrates how advanced language processing and artificial intelligence technologies have come together and how impressive a language model ChatGPT is. The e-book is an ideal resource for anyone who wants to use ChatGPT as a language model.