What has the author Edgar Bonjour written?

There is no widely known author named "Edgar Bonjour". It's possible there is a lesser-known author with this name, but without more information, it's impossible to say what they have written.

Could you please provide more context? Perhaps:

* Is there a specific book title or subject matter you're interested in?

* Do you have any other information about this author, like their nationality or the time period they wrote in?

* Are you sure about the spelling of their name?

With more details, I may be able to help you find information about this author.