Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.

Omega is the last letter of the Greek alphabet, which is the penultimate letter?
psi

According to legend, on which Mediterranean island did the Cyclops, Polyphemus, live?
sicily

Who wrote the General Theory of Employment, Interest and Money in 1936?
john maynard keynes