What has the author Ernest Allen Gerrard written?

There is no widely known author named Ernest Allen Gerrard. It's possible that:

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

* The author is less well-known. Search online databases like WorldCat or LibraryThing, or specific author databases like the Library of Congress, to see if any works are listed under that name.

* The author is writing under a pseudonym. It's possible the author uses a different name for their published works.

Please provide more context or details, such as the genre or time period of the works, so I can help you find the author and their works.