Sarvapalli radhakrishnan's History of indian philosophy:
Volume 2:[url="http://ia600608.us.archive.org//load_djvu_applet.php?file=29/items/Radhakrishnan-History.of.Philosophy-Eastern.and.Western-Volume.1-2/Radhakrishnan-history.of.philosophy-Eastern.and.western-volume.2.djvu"]History of indian philosophy[/url]
Volume 2:[url="http://ia600608.us.archive.org//load_djvu_applet.php?file=29/items/Radhakrishnan-History.of.Philosophy-Eastern.and.Western-Volume.1-2/Radhakrishnan-history.of.philosophy-Eastern.and.western-volume.2.djvu"]History of indian philosophy[/url]