love, read, write

This is a very peculiar book, because it's about outside-world things like the fourth and fifth dimension. It requires a lot of thinking and time to think, so I, on one hand, have to read much slower than I usually do.
This is about a Dark Thing that is covering the Earth, which endangers those who live within it, and this Dark Thing is evil--hatred, accusations, hate, murder, treachery, betrayal, whatever that is Evil, that is bad.
The main charater, who's name is Meg, has a brother named Charles Wallace who has extreme understanding skills, and can almost read minds (I'm not sure whether it's actually directly reading the mind or just simply understanding very well), and Calvin, who is able to go into the mind and understand very well.
They must find their father, who is fighting the Dark Thing. Her father had been studying the art of Tesseration, or Tessering, or going into a Tesseract. To tesser is to go from one place to another by simply wrinkling what is in between. For example, if you take a string and hold one end with one hand and the other end with the other hand, and put an ant on one hand and make it go to the other, it would be a long distance to get to the other hand by going on the string. But if you simply wrinkled the space in between the two hands, the two start and endpoints, by puttting your hands together; folding the string, the ant will be at its destination in just one step. That is the act of tesseration, going on a tesseratct, of tessering. Now, you can do this with time and space, and Meg and Charles Wallace (siblings)'s father had done. He had landed not on Mars (which was his intended destination), but on Camazotz, a planet that had given in to the Dark Thing, and had let itself fall under the Dark Thing's rule, whom they called IT. IT had a strict pulse that if you didn't conventrate away from it, your heart would beat to that pulse, everything would beat to that pulse, and everyone would be doing the same thing in the same rhythm all similarly.It's really creepy, how it's written in the book, and right now you're probably wondering how doing the same thing can be creepy, but you have to read the book to know, just so you know. Anyhow, Charles Wallace, Meg, and Calvin tesser with the thre Ms. W's (Ms. Whatsit, Ms. Who, Ms. Which) to different worlds and finally, to Camazotz, where her father is. Chalres Wallace, in his arrogance and pride and effort to try to read the mind of a person of IT, falls into the hands of IT, and becomes like the people of Camazotz, hypnotized (in the most vaguest expression) and beating to the pulse of IT. Charles Wallace becomes not himself, but who IT orders him to be, and Meg and Calvin must try to get Charles Wallace back to himself as well as find his father.
Which they do find his father, only he doesn't understand that Charles Wallace has changed into under the force of IT, and which her father continues to treat Charles Wallace like he is Charles Wallace and not Charles Wallace Under the Order of IT.
And they actually go to IT, which is a oversized human brain that beats an irresistible beat that if you don't concentrate away from it, or relax for a moment, you go under it's beat and force. you have to not listen to it,think of other things, not give in.
That's as far as I got in the book.

L'engle, Madeleine. A Wrinkle in Time.
(forgot how to do the citation).