The title of this book has a lot of importance. In the book the Glass Castle was a dream the entire Walls family hoped to build one day. This was a plan for a house in the desert and all they had to do to accomplish this goal was find gold. This relates to the book because they always referred to the Glass Castle when something wasn't going great they would think about the Glass Castle to make everything better. Although they never accomplished this goal it helped them get through some hard times.