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.

What is the pen name of Jim Grant, the British author who writes stories about the former U.S. Military Police Major, Jack Reacher?
lee child

Which film series featured the character Martin Riggs?
lethal weapon

What mathematical tabular system was invented in 1614 by John Napier that changes calculations of, for example, multiplication and finding square roots to addition and division respectively?

logarithm