The book is available for download (for free) from: https://steakelectronics.com/books/steakelectronics_2018_2019.pdf
If you are like me, and prefer a print copy (as reading books on a computer screen is painful. I recall Bill Watterson once said he preferred print books. He was right.) then you can buy it online from here: http://www.lulu.com/shop/henrik-wilkkom%C3%A9r/steak-electronics-2018-2019/paperback/product-24436049.html
Music: http://steakelectronics.com/music/2016_17_keyboard/