Non-fiction: The Theory of Money and Credit by Ludwig von Mises. For a book written in 1912 and translated from German, it's a remarkably easy read.
Fiction: Non currently, but I have some queued. First of all "The book of lost things" by John Connolly.
Unfortunately I have read all of John Connolly's books except the one mentioned and "Bad Men". He's working on a new novel but until then I will be out of thrillers soon. Any recommendations?