diff --git a/libs/shared-state-books/src/lib/state.ts b/libs/shared-state-books/src/lib/state.ts
index b6178d5..69134d4 100644
--- a/libs/shared-state-books/src/lib/state.ts
+++ b/libs/shared-state-books/src/lib/state.ts
@@ -13,9 +13,13 @@ export const FEATURE_KEY = 'shared-books';
 /**
  * State Shape
  **/
-export interface State {}
+export interface State {
+  books: fromBooks.State;
+}
 
-export const reducers: ActionReducerMap<State> = {};
+export const reducers: ActionReducerMap<State> = {
+  books: fromBooks.reducer,
+};
 
 export const metaReducers: MetaReducer<State>[] = [];