Colorado Parks & Wildlife Research Library

One night, thirteen-year-old Meg Murry meets an eccentric new neighbor, Mrs Whatsit, who refers to something called a tesseract. She later finds out it is a scientific concept her father was working on before his mysterious disappearance. The following day, Meg, her child genius brother Charles, and fellow schoolmate Calvin visit Mrs Whatsit's home, where the equally strange Mrs Who and the unseen voice of Mrs Which promise to help Meg find and rescue...

With Meg Murry's help, the dragons her six-year-old brother saw in the vegetable garden play an important part in his struggle between life and death.