Here are some cool sites with loads of free books on religion, faith, mysticism, shamanism, and so forth:

1.  Side-by-side compared translations of the Quran:  islamawakened.com/quran/

2.  Sacred texts from many cultures and traditions, even complete Sufi classics:  www.sacred-texts.com/

3.  free Quran, by acclaimed translator Yusf Ali: www.semazen.net/eng/download_detail.php