Wrinkle In Time

Meg's father mysteriously disappears after experimenting with the fifth dimension of time travel. Determined to rescue him, Meg and her friends must outwit the forces of evil on a heart-stopping journey through space and time. A commemorative edition with an Introduction by the author. A Newbery Medal winner.
It was a dark and stormy night; Meg Murry, her small brother Charles Wallace, and her mother had come down to the kitchen for a midnight snack when they were upset by the arrival of a most disturbing stranger. Wild nights are my glory, the unearthly stranger told them. I just got caught in a downdraft and blown off course. Let me sit down for a moment, and then I'll be on my way. Speaking of ways, by the way, there is such a thing as a tesseract. A tesseract (in case the reader doesn't know) is a wrinkle in time. To tell more would rob the reader of the enjoyment of Miss L'Engle's unusual book. A Wrinkle in Time, winner of the Newbery Medal in 1963, is the story of the adventures in space and time of Meg, Charles Wallace, and Calvin O'Keefe (athlete, student, and one of the most popular boys in high school). They are in search of Meg's father, a scientist who disappeared while engaged in secret work for the government on the tesseract problem.
Review:
A coming of age fantasy story that sympathizes with typical teen girl awkwardness and insecurity, highlighting courage, resourcefulness and the importance of famiyl ties as key to overcoming them. --Carol Platt Liebau, author, in the New York Post