To be or not to be (a book)?

In todays tutorial with Yvonne an important issue was raised - should i make a book or a box? As I originally perceived the idea of the project with the final result being a book, I hadn't really envisaged it being anything other than that. I am always open to knew ideas and feel that this box idea itself could be a possibility with a large box containing prints of the submitted portraits leading to the notion that additional portraits could be submitted without the need for creating a completley new product.
There was some concern that the imminent Artists Book Fair could have influenced the final outcome of my project too much, but I had the book idea in mind long before the book fair and genuinely feel that as a collection of contributors work the book would provide me with the best vehicle to bring these works together. In terms of additional volumes of the work I feel that it would be more respectful to the artists contributing for their work to be compiled in another book should this matter arise, rather than their work being crammed in with the original works. The final look of the book itself is still yet to be determined with the notion of creating two formats, a high spec hardback piece and a cheaper zine like multiple, being explored. I feel this could be affective as in terms of choice to prospective clientele at the book fair it could prove more enticing although i am wary that the addition of a cheaper version may deter purchases of the higher quality product, I shall just have to see how it goes...