The Girl on the Train, written by Paula Hawkins, is a gripping psychological thriller that follows the life of Rachel Watson. Rachel, a troubled alcoholic, becomes entangled in a missing person investigation after witnessing something suspicious from her train window. Hawkins' writing is atmospheric and suspenseful, delving into themes of memory, perception, and the dark secrets that people hide. The Girl on the Train has become a sensation among crime mystery readers, thanks to its unreliable narrator and the intricate web of lies and deceit.