public void DeleteBook(string id)
{
var book = GetBookById(id);
var publicationInPublisihngHouses = _publicationInPublisihngHouses.Where(x => x.Publication.Id == book.Publication.Id).ToList();
foreach (var publicationInPublisihngHouse in publicationInPublisihngHouses)
{
_publicationInPublisihngHouseRepository.Delete(publicationInPublisihngHouse.Id);
_publicationInPublisihngHouseRepository.Save();
}
_publicationRepository.Delete(book.Publication.Id);
_publicationRepository.Save();
_bookRepository.Delete(id);
_bookRepository.Save();
}