The Girl on the Train is written by Paula HawkinsPaula Hawkins wrote The Girl on the Train
[Human]: Could you tell me who wrote the book, The Girl on the Train? [Assistant]: Sure, The Girl on the Train is a psychological thriller novel written by Paula Hawkins. Are you familiar with her? [Human]: I am not that familiar with Paula Hawkins. Could you tell what some of her other books are? [Assistant]: Absolutely, she also wrote Into the Water and The Reunion. Did you know that the Girl on the Train was adapted into a film? [Human]: I knew I heard of The Girl on the Train before. I have to check out the books on audiobooks in the near future. Thank you for your help. 
You're very welcome. Enjoy!