Passage: The work was composed by Ban Gu, a court official, with the help of his sister Ban Zhao, continuing the work of their father, Ban Biao. They modeled their work on the Records of the Grand Historian, a universal history, but theirs was the first in this annals-biography form to cover a single dynasty.  It is the best source, sometimes the only one, for many topics in this period. A second work, the Book of the Later Han covers the Eastern Han period from 25 to 220, and was composed in the fifth century by Fan Ye (398–445).

Question: What was the second work called?
Book of the Later Han