This is not uncommon. Indeed, one should find it surprising if book names were routinely globally unique. Some famous dupes are Twilight, and Foundation, and Invisible Man.

I mean, I undersand that. I have two "on writing" on my bookshelf next to each other... but Werner Herzog's has the exact same topic and premise, plus is from a person that is immensely more famous than you, which means your book will be invisible with that title to any search.