Buddha and His Dhamma by Dr B R Ambedkar

This book also can be found at following resourses:

http://buddhambedkar.files.wordpress.com/2010/04/buddha-and-his-dhamma.pdf

http://www.columbia.edu/itc/mealac/pritchett/00ambedkar/ambedkar_buddha/index.html

http://drambedkarbooks.files.wordpress.com/2009/03/buddha-and-his-dhamma.pdf

http://www.ambedkar.org/buddhism/BAHD/45A.Buddha%20and%20His%20Dhamma%20PART%20I.htm

http://www.scribd.com/doc/30434148/Buddha-and-His-Dhamma

http://www.scribd.com/doc/16634512/Buddha-and-His-Dhamma-by-B-R-Ambedkar-Full