For a book club app I’m writing In SwiftUI, I have a NavigationSplitView that has a selectable List on its leading column. The first item on the list is “Book” and will take the user to a book’s PDF if selected. Below it is a Button with a plus icon that allows the user to add a reader of the book. Once a reader is added, their name will appear on a List just below the plus Button. If a user selects a reader, they’ll be taken to their profile page.