def authorSearch(author)
        books = []
        complex_entity_key = "#{author}"

        isbns_books = @Remote_cache.get "bks_#{author}"

        if isbns_books
            isbns_books.split(',').each do |isbn|
                version = @Remote_cache.get "v_#{isbn}"
                if version
                    complex_entity_key += "_#{isbn}_#{version}"
                else
                    complex_entity_key += "_#{isbn}_1"
                end
            end

            str_books = @Remote_cache.get complex_entity_key
            if str_books
                str_books.split(';').each {|book| books.insert(-1,BookInStock.from_cache(book))}
            else
              books = @database.authorSearch author
              isbns = ""
              str_books = ""
              complex_entity_key = "#{author}"
              books.each do |book|
                isbns += "#{book.isbn},"
                str_books += "#{book.to_cache};"
                version = @Remote_cache.get "v_#{book.isbn}"
                if version
                  complex_entity_key += "_#{book.isbn}_#{version}"
                else
                  complex_entity_key += "_#{book.isbn}_1"
                end
              end
              if books.size>=1
                  @Remote_cache.set "bks_#{author}", isbns[0,isbns.size-1]
                  @Remote_cache.set complex_entity_key, str_books[0,str_books.size-1]
              end
            end
        else
          books = @database.authorSearch author
          isbns = ""
          str_books = ""
          books.each do |book|
            isbns += "#{book.isbn},"
            str_books += "#{book.to_cache};"
            version = @Remote_cache.get "v_#{book.isbn}"
            if version
              complex_entity_key += "_#{book.isbn}_#{version}"
            else
              complex_entity_key += "_#{book.isbn}_1"
            end
          end

          if books.size>=1
              @Remote_cache.set "bks_#{author}", isbns[0,isbns.size-1]
              @Remote_cache.set complex_entity_key, str_books[0,str_books.size-1]
          end
        end
        books
    end