Sierra Morena is only an idiom.
The Web of Indian Life -LRB- 1904 -RRB- is a book written by Sister Nivedita .. Sister Nivedita. Sister Nivedita. This book is a collection of essays and created a sensation when it was first published .. The introduction of the book was written by Rabindranath Tagore .. Rabindranath Tagore. Rabindranath Tagore