Having ”[a]t least one embedded image or video”, like this community’s rules asked for, would not only prevent your announcement from being removed but would also aid the readers in quickly determining if this book might be of any interest to them. (This might seem odd for a book, but I [for example] get a much better impression when looking at that one screenshot you used on your store page.)

Using the “Languages: Spanish; Castilian” tag on the store page might also help your book being discovered by potential readers that are using the search.