To mention the topic of a book, I can say that such and such a book is about something or that it tells about something.
Can I say that it talks about something?
Ngram-viewer-ing the book is about, the book tells about, and the book talks about indicates that using tell and talk are far less common than be in this context.
ngram viewer: the book is about, tells about, talks about
Talk sounds weird to me because you do not talk to/with a book: language, information only flow one way, from the book to you; reading a book is not having a conversation with it!