I'm not sure specifically what '3 03 a novel and commonplace book' is about without more context. It could be a unique piece of literature that combines elements of a novel and a commonplace book. Maybe it contains fictional stories along with personal musings or observations.
Well, '3 03 a novel and commonplace book' might be a rather unusual title. It could potentially be a book that blurs the lines between a traditional novel and a commonplace book. A commonplace book usually has various notes, quotes, and ideas. So perhaps this 'novel and commonplace book' has a narrative interspersed with such elements. For example, the author might have included snippets of real - life conversations or interesting facts within the fictional story.
Since we don't have much information about '3 03 a novel and commonplace book', it's difficult to say exactly what it's about. However, if we consider the nature of a commonplace book, which often serves as a sort of personal repository of knowledge and thoughts, and combine it with the concept of a novel, it could be a creative work. It might tell a story while also including the author's reflections on various topics, like philosophy, art, or human nature. The '3 03' part of the title is rather mysterious. It could be a code, a reference number, or just a creative addition to make the title more distinct.