Challenge: Adding Extra Screens

Update May 2020: I have updated the final project so that it runs fine on the latest version of Xcode (11.4.1). I had to make one minor change:

1) Change Segue Transition

In Main.storyboard, select the segue between About View Controller and About Author View Controller. In the Attribute Inspector, change the Transition to Flip Horizontal.

That's it! Everything should now run fine :]