The last sentence of the last paragraph on page 83 starts with “There you set your Foo object to be the target of both buttons,…”. What is this Foo object of which you speak? The target for the buttons was the RandomController, was it not?
Nice catch. Yes, Foo should be RandomController. (RandomController was called Foo in the prior edition.)
My wife was an editor for years. I’m afraid she infected me with it.