What bible book did Nehemiah write?
Nehemiah wrote the book of NEHEMIAH !!!!
Yes, he was. The editors of the Jewish canon (or their forebears) personally knew Nehemiah, knew about his family, knew about his work, knew about his book, his record of the events surrounding the rebuilding of the walls of Jerusalem. There was a chain of provenance for the book going back to its author.
Esther is the only book of the Hebrew Bible not found in the Dead Sea Scrolls. Because Ezra and Nehemiah used to be on one scrool and parts of Ezra were found, scholars assumed this indicated that Nehemiah was in the Dead Sea Scrolls, too. Recently, a fragment of Nehemiah has been identified as coming from among the Dead Sea Scrolls.