A Wrinkle in Time is about a brother and a sister who go on a journey through time and space. They must fight a machine known as "It" who controls everything on the planet of Camazotz. I loved this book because it was filled with action and adventure. I especially liked when one of the kids gets trapped in the machine and needs to be rescued.
I think the main message of this book is that you should never give up on friends and family, and to try your best even when you are feeling down.