What does mean in this http.get?

  getBooks(): Observable<Array<Books>> {

    return this.http
      .get<{ items: Books[] }>(
        'https://www.googleapis.com/books/v1/volumes?maxResults=5&orderBy=relevance&q=oliver%20sacks'
      )
      .pipe(map((books) => books.items || []));
  }

Trying to understand the TypeScript syntax here:

.get<{ items: Books[] }>(

Does this mean that first it gets the URL and does a map filter operator on it, then it’s returning an object that only contains an items property with the interface Books[]?