On the 'Get the book' link, the last paragraph states: 'We have set a minimum contribution of _FREE and a suggested contribution of $19 to cover the time and investment the four of us put into this book.' The 19$ is the…
On the 'Get the book' link, the last paragraph states: 'We have set a minimum contribution of _FREE and a suggested contribution of $19 to cover the time and investment the four of us put into this book.' The 19$ is the…