The Haruhi Suzumiya series was a very popular light novel series. Which one to read first and which one to read next depended on one's personal interest and reading preferences. The following is the approximate order of all the works in the series for reference: 1. The Melancholy of Haruhi Suzumiya 2 "The Sigh of Haruhi Suzumiya" 3. Haruhi Suzumiya's Mourning 4. The Disappearance of Haruhi Suzumiya 5 " The Promise of Haruhi Suzumiya " 6. The Adventures of Haruhi Suzumiya 7 " The Troubles of Haruhi Suzumiya " 8. The Madness of Haruhi Suzumiya Chapter 9: Haruhi Suzumiya's Cold War Chapter 10: Haruhi Suzumiya's Despair 11 " Haruhi Ryomiya's Nogahara Man " Chapter 12: Haruhi Suzumiya's Principles of Doing Things When reading these works, you can arrange the reading order according to your own interests and preferences or read them in order of time to better understand the plot and character development of the entire series.