I felt that this novel was a book within a book. It accounts a (fake) tale from the author Goldman and his commentary over his favourite (and fictional) book. 
 He talks about the significance of this book throughout his life as his father read it to him growing up. He then bought the book for his son, only to find out Goldman's father only read his son the good parts. This prompted Goldman to claim the rights to the book to rewrite it as he remembers it to preserve what made the book so great growing up. 
 The book Goldman loves so much was the Princess Bride. It was full of adventure, sword fights and danger. 
 I found Goldman's commentary to compliment the book and I even enjoyed his own backstory. At first I wasn't interested in Goldman's history and wants to focus on the Princess Bride, but eventually I was won over.