I bought "The Host" by stephenie meyer (author of twilight saga) recently and I am actually GLUED to the book! Yes, there is about 652 pages in total including the prolouge etc. but, if you have the time, its well worth a read;
Its about a new species of life, from a differerent planet who come to earth and take over the minds of humans. One of these things- Wanderer- is inserted in a host body of a 17yr old named Melanie Stryder.....
Its a great read, I swear
My personal experience