A Wrinkle in Time was one of the first time travel books I ever read. The genre remains one of my favorites, and I credit the author, Madeleine L’Engle. Here’s some of her advice to writers.
http://www.brainpickings.org/2014/12/18/madeleine-lengle-creativity-hope-mihaly-csikszentmihalyi/
sharon p. lynn 