Last week's question was: What novel centered on a financial scam involving the construction of a U.S./Mexico railroad? The answer is "The Way We Live Now," by Anthony Trollope. The novel's central scandal is reminiscent of both Enron and Bernie Madoff, so though published in 1875, the book really is the way we live now.
Nobody got the answer, though there were good guesses. Several people guessed "Atlas Shrugged" by Ayn Rand, which also involved railroad construction, but that was more of a scheme than a scam.