This is a large format book of approx 140 pages originally published in 1998, so it's a large but very expensive book.
There are colour photographs of different hats at the start, but only black and white line drawings of instructions for the projects. This gives it a very out of date feel. Nor does it include techniques using sinnamay, or blocking felt on to a wooden hat block.
There are good instructions for sewn hats and turbans. However I am an amateur milliner and the pattern cutting looks very complicated.
Overall I don't think this is worth spending the money for amateur millinery.