Which kind of informational text is a book written by historian about the life and Times of George Washington
biography
The kind of informational text you are referring to is a biography. A biography is a type of nonfiction writing that tells the story of a person's life. In this case, the book written by a historian about the life and times of George Washington would be considered a biography of George Washington.
To find books like this, you can start by searching online on websites like Amazon or Goodreads using keywords such as "George Washington biography" or "historian's book on George Washington." You can also visit a library and ask a librarian for assistance in locating biographies of George Washington. The History section or the Biography section of a library would be good places to start exploring. Once you have identified a specific book, you can either purchase it online or check it out from the library, depending on your preference.