Big Al

Big Al is the owner of the Carnival of Horrors from Escape from the Carnival of Horrors and it's sequel, Return to the Carnival of Horrors. In both books, Big Al is the main antagonist and adversary that the reader must face.

Escape from the Carnival of Horrors
In this book, it is established that Big Al is the owner of the Carnival of Horrors, and he has the power to enslave carnival attendees, turning them into ghosts and keeping them in the Carnival of Horrors. It's unknown how old Big Al is or when he took control of the carnival.

Return to the Carnival of Horrors
In this book, the reader can visit Big Al's office. There, they find a control booth that has controls for basic things such as the rides, but it can also be used to control space and time. This allows Big Al to take the Carnival anywhere he wants.

Physical appearance
Big Al is described as being hefty and abnormally tall. He has coal black eyes and a thick mustache. Furthermore, Big Al wears a bright checkered jacket.

Trivia

 * Big Al is one of the only characters to appear in two Give Yourself Goosebumps books.
 * Big Al and Patty are the only characters that appear in both Escape from the Carnival of Horrors and Return to the Carnival of Horrors, excluding the reader's character.
 * Big Al is accidentally referenced in the Goosebumps Official Collector's Caps Book. The book asks, "Who is the director at Camp Nightmoon in Welcome to Camp Nightmare?" The answer should be Uncle Al, but the back of the book says "Big Al."
 * The Goosebumps Official Collector's Caps Book was released a month before Escape from the Carnival of Horrors, meaning that the two books were likely being worked on at the same time.