Durarara!!x4 (デュラララ!!x4), is the fourth light novel in the series. The Japanese version is 268 pages long, while the American version is 215 pages. The novel includes five chapters, a prologue, and an epilogue.
The fourth light novel was adapted into the first part of Durarara x2 Shou, the first cour of the second season of the anime.
Ikebukuro, Tokyo. A place full of fires waiting to be lit and plenty of people ready to light a match: Twins who are the perfect opposite of each other. An idol who's nothing like her older brother. A girl with a crush on her senior in the Dollars. And a headless rider with a bounty on her...uh, head. Keeping the peace is probably not gonna happen.
- Prologue: Rumor
- Chapter 1: Daioh TV Special Program Ikebukuro's 100-Day Front
- Chapter 2: Youth Magazine Mao "New Spring Life! High Schoolers' Tokyo Debut Special! Ikebukuro Edition"
- Chapter 3: Wakahime Club "The Hottest Spring in the World! The Erotic Terminal of High School Girls, Ikebukuro!"
- Chapter 4: Gao Magazine Special Article "Spotted! Yuuhei Hanejima and Ruri Hijiribe in a Late-Night Tryst?!"
- Chapter 5: Ikebukuro Guide Book Ikebukuro Strikes Back II: Tales of Violence in Ikebukuro
- Epilogue: Epilogue 1 Secret Conversation, Epilogue 2 Roundtable Conversation
Info from amazon.co.jp