public EBooksFilterService(IEBooksRepository eBooksRepository) => _eBooksRepository = eBooksRepository;
public EBooksSearchService(IEBooksRepository eBooksRepository) => _eBooksRepository = eBooksRepository;
public EBookRepositoryService(IEBooksRepository eBooksRepository, IFilePdfConverter pdfConverter) { _eBookRepository = eBooksRepository; _pdfConverter = pdfConverter; }