To set a bookmark, tap the bookmark button located at the top-right corner of each chapter. Setting a bookmark that’s in use will remove its current referrence.
To jump to the chapter of a bookmark, tap the menu button on the navigation bar; then tap the bookmark you wish.
To remove a bookmark, tap the menu button on the navigation bar; then tap the
x button next to the bookmark. If you are currently reading the chapter of the bookmark, you can also tap the highlighted bookmark to remove it.