"A Wrinkle in Time" Wikipedia Entry
http://en.wikipedia.org/wiki/A_Wrinkle_in_Time
The Wikipedia entry for the novel.
Madeleine L'Engle
http://www.madeleinelengle.com/
This site is the home of Madeleine L'Engle's personal website. Though L'Engle passed away several years ago, the site is still updated with information regarding her legacy and the work that continues in her name.
"A Wrinkle in Time" Fan Page
http://www.thealmightyguru.com/Reviews/WrinkleInTime/Index.html
This fan page links to several interesting articles about L'Engle and the book, as well as articles on the 2003 TV miniseries based on the book.
An Illustration of Space and Time - The Fourth Dimension
http://www.youtube.com/watch?v=lEiNsrtuGcc
This illustration shows the complexity of understanding the space/time continuum, a concept that is central in L'Engle's book.
A Wrinkle in Time - Publisher's Page
http://www.awrinkleintime.net/
This page gives some general history about the book and its author.
