Adam here. In recent years, when Brandon releases a new book, we have offered a limited quantity of signed and numbered copies to Weller Book Works—a local book seller—to ship copies around the world for people who are unable to attend the release party. Starting with Oathbringer, we opted to turn this into a fundraising event by asking for small donations that will be sent to Worldbuilders—a geek-centered nonprofit supporting humanitarian efforts worldwide—which you should definitely check out.