It takes up quite a lot of space and has to be printed on heavy paper, which means it was impossible to fit all of OOTP into one book.
The first four volumes were sent out earlier this week and the rest of the book will be posted to people over the next two weeks. It will be sent out three volumes at a time.
John Donaldson from The Scottish Braille Press told us: "We've had about 80 orders for OOTP - that's big demand for a Braille book."
People have to mail-order their copies.
John said that there had been about 50 orders for each of the previous four Potter books since they were published.