What has the author Issac Errett written?

There doesn't appear to be a widely recognized author named "Issac Errett". It's possible that:

* The name is misspelled: Double-check the spelling of the author's name.

* The author is less known: There might be an author with a similar name who has written works, but they are not widely known.

* You might be thinking of a different person: Could you provide more context? Perhaps a book title, genre, or time period would help narrow down the search.

Please provide additional information to help me find the author you're looking for.