public Task <Book> ConvertAsync(Book source) => Calibre.ConvertAsync(source, Format, "--mobi-file-type old");
public Task <Book> ConvertAsync(Book source) => Calibre.ConvertAsync(source, Format, string.Empty);
public Task <Book> ConvertAsync(Book source) => Calibre.ConvertAsync(source, Format, "--mobi-file-type old");
public Task <Book> ConvertAsync(Book source) => Calibre.ConvertAsync(source, Format, string.Empty);