I am getting following error and not sure whats causing problem.

I tried to run application and getting following
error:DesktopGraphqlgraphql-playlistserverschemaschema.js:94
});
 ^

const RootQuery = new GraphQLObjectType({
  //Query for getting details of a specific book.
  name:'RootQueryType',
  fields:{
     book:{
      type:BookType,
      args:{id:{type:GraphQLID}},
      resolve(parent,args){
        console.log(typeof(args.id));
       return_.find(books,{id:args.id});
      }
    },
    author:{
     type:AuthorType,
     args:{id:{type:GraphQLID}},
     resolve(parent,args){
       //code to get data from db/other source.
    return_.find(authors,{id:args.id});
     }
   },
   books:{
     type:new GraphQLList(BookType),
     resolve(parent,args){
       return books;
     }
   },
   authors:{
     type:new GraphQLList(AuthorType),
     resolve(parent,args){
       return authors;
   }
  }
//line 94
});