Finishing off chapter 3 from the book. The home view displays car info and from here you can choose to add a new car. This loads the edit/add view. Views are linked using a segue, added in Interface Builder. To pass data between the views we use the prepareForSegue method, getting a reference to the next controller and preparing the data from the current car object to be sent to the edit/add screen. Once editing is complete we send the data back to the home screen and use the segue unwind method/action from the UISoryboard class to update the car's info.