The maze runner theme

The book I am reading is called the maze runner scorch trials & the author is James dashner. This book is about these people who escape a maze & now they are trying to find a way to escape wicked who wants them. What I think the theme of this book is friendship. The reason I pick this theme is because throughout the book they didn't want to split up & they wanted to be close so that nothing would happen to them. "As they walked down the hall to join the others." This quote means that they wanted to be together.