Vanitas by Danné Ojeda/d-file studio is described as a literal interpretation of the Dutch vanitas still life movement.
Taking the idea of a book being the realisation of its authors mind, alongside the the common vanitas pairing of a book and a skull, Ojeda has used MRI technology to capture imagery of her own brain and skull that becomes the sole content of the book.
As such, the book’s height is a 1:1 scale match to the height of its authors skull.