Modern Novels - Mark T. Zegarelli

Five students of twentieth-century literature (Oscar, Peter, Shirley, and two women named Ruth) elected to write their term papers each on a different work of fiction (including William Faulkner's Light in August and Katherine Anne Porter's Ship of Fools). One pair of students are siblings with the same last name, and the other three are unrelated. Can you deduce the full name of each student (at least one is surnamed Zaniewski), and the novel that each chose?

1. Shirley is an only child.
2. The two men are unrelated; exactly one of them chose a Faulkner novel.
3. The student (whose first name isn't Ruth) who chose Ernest Hemingway's The Sun Also Rises has a sibling in class.
4. The book chosen by the only student surnamed Yorke didn't have "light" anywhere in its title.
5. Four of the five students are Oscar, Ms. Underwood, the only student surnamed Valdez, and the one who chose Virginia Woolf's To the Lighthouse; the fifth student shares either a first name, last name, or choice of author with the person who chose William Faulkner's Absalom! Absalom!