„[Graham Greene’s] ability to encapsulate the essence of an exotic setting in a single book is exemplified in The Heart of the Matter (1948); his contemporary Evelyn Waugh stated that the West Africa of that book replaced the true remembered West Africa of his own experience.“

— Anthony Burgess

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„We can no longer expect the one big book, the single achievement, to be an author's claim to posterity's regard. We shall be more inclined to assess the stature of a novelist by his ability to create what the French call an oeuvre, to present fragments of an individual vision in book after book, to build, if not a War and Peace or Ulysses, at least a shelf.“
— Anthony Burgess
„A wise reader reads the book of genius not with his heart, not so much with his brain, but with his spine. It is there that occurs the telltale tingle…“
— Vladimir Nabokov
„Beware the man of a single book.“
— Thomas Aquinas