using System;

public class Program

{

    public static void Main()

    {

        string input = "{\"query\":\"{\\n\\tbooks{\\n\\t\\tname,\\n\\t\\tisbn,\\n\\t\\tauthor{\\n\\t\\t\\tname\\n\\t\\t},\\n\\t\\tpublisher{\\n\\t\\t\\tname\\n\\t\\t}\\n\\t}\\n}\",\"variables\":null,\"operationName\":null}";

        var output = input.Replace(@"\\", @"\");

        Console.WriteLine(output);

    }

}