diff --git a/libs/shared-state-books/src/lib/books.reducer.ts b/libs/shared-state-books/src/lib/books.reducer.ts
index b653d33..89efeef 100644
--- a/libs/shared-state-books/src/lib/books.reducer.ts
+++ b/libs/shared-state-books/src/lib/books.reducer.ts
@@ -34,5 +34,29 @@ export const reducer = createReducer(
       ...state,
       activeBookId: action.bookId,
     };
+  }),
+  on(BooksApiActions.booksLoaded, (state, action) => {
+    return {
+      ...state,
+      collection: action.books,
+    };
+  }),
+  on(BooksApiActions.bookCreated, (state, action) => {
+    return {
+      collection: createBook(state.collection, action.book),
+      activeBookId: null,
+    };
+  }),
+  on(BooksApiActions.bookUpdated, (state, action) => {
+    return {
+      collection: updateBook(state.collection, action.book),
+      activeBookId: null,
+    };
+  }),
+  on(BooksApiActions.bookDeleted, (state, action) => {
+    return {
+      ...state,
+      collection: deleteBook(state.collection, action.bookId),
+    };
   })
 );