Step 1: Understanding the question.
The question asks about Erich Segal, an author known for writing novels. It is asking which of the listed books was not written by him.
Step 2: Analyzing the options.
(A) Love Story: This is a famous novel by Erich Segal, and he is the author of it.
(B) Oliver Story: This is incorrect — Erich Segal did not write a book titled "Oliver Story."
(C) Man, Woman and Child: This is another well-known book by Erich Segal.
(D) Only Love: This is also written by Erich Segal.
(E) Love Letters: This is a collection of writings by Erich Segal.
Step 3: Conclusion.
The correct answer is (B) Oliver Story, as Erich Segal is not the author of this book.