The Heart of the Matter
http://www.nytimes.com/1948/07/11/books/greene48-heart.html?_r=0
The 1948 New York Times review of the novel.
The Heart of the Matter
http://www.penguin.com/read/book-clubs/the-heart-of-the-matter/9780142437995
Penguin's official reading guide for the novel.
The Heart of the Matter
http://archive.org/stream/heartofthematter031009mbp/heartofthematter031009mbp_djvu.txt
The e-text from the Internet Archive.
Goodreads - The Heart of the Matter
http://www.goodreads.com/book/show/3692.The_Heart_of_the_Matter
The Goodreads page for the novel, containing user reviews, discussion, and ratings.
