Tracking the Golden Isles question

I am the author of a new book, but it is listed under "Anthony J Martin," not "Anthony J. Martin" (notice the period after "J."). The book is:

https://www.goodreads.com/book/show/4...

How do I correct this mistake and make sure the book is added to my author list? I have tried posting messages on the Goodreads Librarian Group three times, but still have received an answer or any other help. What else should I do? Thank you!