Complex sentence: It is the first book of his Jiangnan Trilogy, of which the second book, "My Dream of the Mountain and River" (山河入梦 "Shanhe Rumeng"), was published in 2007.
Split into simpler sentences: It is the first book of his Jiangnan Trilogy. The second book of the trilogy, 山河入梦 "Shanhe Rumeng" ("My Dream of the Mountain and River"), was published in 2007.