I'm sorry, but I couldn't find information about an author named סדרת גדולי האומה. It's possible that the author's name was misspelled or that they are not well-known in the sources I have access to. If you can provide more context or details about the author, I may be able to assist you further. Alternatively, if you meant a different author or book series, please let me know so I can provide accurate information.