/// <summary>
/// Default constructor.
/// </summary>
public BookApiService()
{
this._isbnApiClient = new IsbnApiClient();
this._authorApiClient = new AuthorApiClient();
}
/// <summary>
/// Constructor with dependency injection of API clients.
/// </summary>
/// <param name="isbnApiClient"></param>
/// <param name="authorApiClient"></param>
public BookApiService(IIsbnApiClient isbnApiClient, IAuthorApiClient authorApiClient)
{
this._isbnApiClient = isbnApiClient;
this._authorApiClient = authorApiClient;
}