Derek turned 14 in the 1st or 2nd book. This is a more accurate answer. I messed up on the other one.
He started out as 13 at first but turned fourteen in the fourth book of the series
The climax of "The Haunting of Derek Stone: Bayou Dogs" occurs when Derek Stone confronts the evil forces that have been haunting him and his family, and he must make a difficult decision that will determine the outcome of the supernatural events. This pivotal moment brings resolution to the main conflict in the story and reveals the true nature of the haunting.
i don't think so because he finished writing in 2009 and it is now 2011. so probably no
"The Haunting of Derek Stone" follows the story of Derek, a young boy who experiences strange and frightening occurrences after moving to a small town with his family. As he uncovers the town's dark history, Derek realizes he has a special connection to the ghostly apparitions that haunt the area. With the help of friends, he must confront these supernatural forces and unravel the mystery behind the hauntings to protect his family and restore peace. The story blends elements of mystery, adventure, and the supernatural, emphasizing themes of courage and friendship.
He is 22 years old
In life with Derek Lizzie is 11 years old.
As of the 2014 MLB season, Derek Dietrich is 24 years old.
As of the 2014 MLB season, Derek Norris is 25 years old.
Derek Roy is 28 years old (birthdate: May 4, 1983).
Derek Hough is 32 years old (birthdate: May 17, 1985).
Derek Dooley is 49 years old (birthdate: June 10, 1968).
Derek Mountfield is 45 years old (birthdate: November 2, 1972).