ARTag

hy ther /prog/, i whant to try the Globin xna, a platform that combines Aumented reality and microsoft xna.

the only proble is that i got to install the ARTag marker-based tracking library, for download that (http://www.artag.net/sdk_download/artag_sdk_download.php) i nead to need to
purchase a copy of Mark Fiala’s book and i ain't got any money.

could some one help me !!!