It's been a while since we had a bubble pop. Via the Freedom of Information Act, we are finally able to see an internal Federal Reserve Bank of New York document, nicknamed the "Doomsday Book," containing legal memoranda and agreements for handling financial crises. It serves as a resource for FRBNY lawyers, offering guidance on various emergency lending scenarios and legal issues. The book covers numerous topics, including emergency credit and payment agreements, master agreements, and legal opinions on the FRBNY's powers. Much of the content is highly confidential and protected by attorney-client privilege. The document's history and revisions reflect evolving legal landscapes and the FRBNY's responses to past financial crises.