Complex sentence: Theodore Dreiser paraphrased many of the actual letters in "An American Tragedy", quoting the final letter almost verbatim; however, neither movie version (the 1931 film nor the 1951 film adaptation "A Place in the Sun") incorporated the letters.
Split into simpler sentences: Theodore Dreiser paraphrased many of the actual letters in "An American Tragedy", quoting the final letter almost verbatim. Curiously, neither movie version (the 1931 film nor the 1951 film adaptation "A Place in the Sun") incorporated the letters.