The landlord seems to be studying the history of the Taiping Heavenly Kingdom. I don't know if I have read the book Taiping Miscellanies. The author's name is Pan. You can't buy this book, but it should be no problem to find an e-book. There is also a book called Taiping Heavenly Kingdom is not peaceful, which was written by Shishi and published by Chongqing Publishing House. This book is also good, you can buy it.