OK so I got quite a few requests to make this highly scientific graph of mine into a T Shirt. Here it is.
I have decided to print via teespring, who basically take a minimum order and then print when all the orders are in. It saves me from a) putting myself into the poorhouse by spending loads of money on T Shirts upfront and b) get me out of the dog house by not filling rooms of our house with stuff.
I still have a garage full of books..
There are a few different colours.