Yes, writing a book about overcoming depression and anxiety through self-help can indeed make someone an author. An author is someone who writes or creates a literary work, and publishing a book certainly qualifies someone for that title.
Becoming an author involves more than just writing a book; it also includes the process of getting the work published and making it available to readers. Whether the book is self-published or traditionally published through a publishing house, the act of creating a written work and making it available to the public is what establishes someone as an author.
Writing a book about overcoming depression and anxiety through self-help can be a significant accomplishment. It allows the author to share their knowledge, experiences, and insights with others, potentially helping those who may be struggling with similar issues.
Being an author doesn't necessarily depend on the book's commercial success or popularity; it is about the act of creating and sharing written content. Even if the book helps just a few people, it can still have a meaningful impact and establish the writer as an author.