The book presented here is probably the most recent one and contains the newest information. It’s called ‘K-pop - The International Rise of the Korean Music Industry’ and describes KPop as the greatest export of South Korea.
It presents how internet was the main medium that helped Korean music to gain so many fans around the world. It discusses what were the reasons for its success.
The book is the most expensive from all you can read about on this site but it’s worth its price. You can get reliable knowledge from professional point of view. The authors are Choi Jung Bong who is Assistant Professor in the Department of Cinema Studies at New York University and Roald Maliangkay – Senior Lecturer in Korean Studies at the Australian National University.
The book is written in English and has 194 pages. The dimension of this book are 0.8 x 6.2 x 9.2 inches. It is published by Routledge.
If you're looking for something less expensive I can suggest the book ‘K-POP Now!: The Korean Music Revolution’.