About the book (from Wikipedia):
The Life and Letters of Charles Darwin is a book published in 1887 edited by Francis Darwin about his father Charles Darwin. It contains a selection of 87 letters from the correspondence of Charles Darwin, an autobiographical chapter written by Charles Darwin for his family.
It was published by Darwin’s publisher John Murray.
The autobiographical chapter had begun as recollections, written for his own amusement and for his descendants, initially as 121 pages written between May and August, 1876, and expanded during the remaining six years of his life. It was edited by Francis to remove references to his father’s views on religion. These were later reinstated and published as The Autobiography of Charles Darwin in 1958 by Charles’s granddaughter (and Francis’s niece) Nora Barlow.
The book was the first real biography of Charles Darwin, excepting obituaries, and thus the foundation of the Darwin Industry.