AF archive/Alamy

(born 1954). With an ear for classroom banter, an eye for what young people consider funny, and a mind that remembers what it was like to be a child, American author Louis Sachar created numerous books that were popular with children. Already known for his "Wayside School" series and his "Marvin Redpost" chapter books, he solidified his place in children's literature by winning the 1999 Newbery Medal for Holes (1998).

Sachar was born on March 20, 1954, in East Meadow, New York. He moved to Tustin, California, at age nine. While studying economics at the University of California at Berkeley, he decided to become a teacher's aide at a local elementary school in exchange for college credit. The experience led him to write stories about a fictionalized school called Wayside. Many of the characters were based on children he met. Sachar himself appears as the lunchtime supervisor known as Louis, the Yard Teacher. Sideways Stories from Wayside School, Sachar's first book, was published in 1978. Other publications in the series include Wayside School Is Falling Down (1989), Sideways Arithmetic from Wayside School (1989), and Wayside School Gets a Little Stranger (1995).

Sachar earned a law degree from Hastings College of Law in San Francisco, California, in 1980. He practiced law while pursuing his writing career until the late 1980s, when his books sold enough to enable him to be a full-time author. One of his most popular books was There's a Boy in the Girls' Bathroom (1987), a story about the transformation of a fifth-grade bully. Like many of Sachar's books, it deals with the theme of trying to find an identity. Sachar's wife provided the basis for the character Carla, the helpful school counselor.

The character of nine-year-old Marvin Redpost debuted in Marvin Redpost: Kidnapped at Birth? (1992). Marvin's four-year-old sister was based on Sachar's own daughter, who was that age at the time. Other books in this series include Marvin Redpost: Why Pick on Me? (1993), Marvin Redpost: Alone in His Teacher's House (1994), and Marvin Redpost: Class President (1999).

In addition to his Newbery Medal, Sachar won the National Book Award and the Boston Globe–Horn Book Award for Holes. A young adult novel that is substantially longer than his other works, the book tells of a boy with a family history of bad luck. He is sent to a juvenile detention facility after being wrongfully accused of stealing some shoes. As punishment, he must dig holes in the camp's dried-up lake bed each day. Discoveries abound, from the warden's secret agenda for all those holes to how friendship and happiness can be found in unlikely places. The book was turned into a movie, also called Holes, in 2003. Sachar wrote the screenplay for the movie.

Sachar continued to write books in the 21st century. Small Steps (2006) follows one of the characters from Holes after he leaves the camp and gets involved with a get-rich-quick scheme. The Cardturner (2010) explores a teenager's relationship with his sick great-uncle as they spend time together playing bridge. Sachar returns to middle school in Fuzzy Mud (2015). The thriller explores friendship and family as three students stumble upon some unusual mud that quickly causes a biological catastrophe.