There's an extract of this book in the documentation, but it seems like every link to purchase the full version has been removed.

Is there a place I can buy or download this book? It has a lot of topics I'd love to learn about.

the latest "Hands On AppGameKit Studio" Vols 1 & 2:
http://www.digital-skills.co.uk/buyebook.html

and the resources that accompany:
http://www.digital-skills.co.uk/agk2downloads.html
&
http://www.digital-skills.co.uk/agk3downloads.html