How do I update my Chinook Book app on iOS

To update your app on iOS: 

1. Tap the App Store icon on your home screen. 
   
   
   
   
2. Tap the Updates tab on the bottom row
   
   
   
   
3. You will see Chinook Book in this list. Tap the Update button. (The App Store may require your password to update this app. ) 
   
   
   
   
4. After updating, tap Open to launch the updated Chinook Book.