The document summarizes key lessons from three nonfiction books: 1) The Fearless Organization discusses building teams that can innovate through uncertainty, and emphasizes that the best teams are not afraid to discuss mistakes in order to build psychological safety. 2) A More Beautiful Question encourages questioning the status quo by asking "why," "what if," and "how" questions to spark new ideas, as challenging assumptions can lead to interesting discoveries. 3) The First 90 Days provides advice for having impact in a new role, such as setting value-delivery milestones, owning success negotiations with your boss, and putting initial time into learning before taking action to lay the groundwork for future changes.