Lastly, we just need to do a slight update to the app.module.ts file to have it point correctly to our JediListReducer, like so:

// app.module.ts

import { BrowserModule } from "@angular/platform-browser";
import { NgModule } from "@angular/core";
import { StoreModule } from "@ngrx/store";
import { AppComponent } from "./app.component";
import { counterReducer } from "./reducer";
import { JediModule } from './jedi/jedi.module';
import { jediListReducer } from "./jedi/jedi-list/jedi-list.reducer";  

@NgModule({
  declarations: [AppComponent],
  imports: [
    BrowserModule,
    StoreModule.forRoot({ 
      counter: counterReducer, 
      jediList: JediListReducer 
    }),
    JediModule
  ],
  bootstrap: [AppComponent]
})
export class AppModule {}