Is this approach okay? #flatten #reduce #map

// flatten favouriteBooks objects and map over objects to extract title strings.
const titles = users
    .reduce((arr, user) => [...arr, ...user.favoriteBooks], [])
    .map(book => book.title)
console.log(titles);

// DATA SOURCE

const users = [
  {
    name: 'Samir',
    age: 27,
    favoriteBooks:[
      {title: 'The Iliad'},
      {title: 'The Brothers Karamazov'}
    ]
  },
  {
    name: 'Angela',
    age: 33,
    favoriteBooks:[
      {title: 'Tenth of December'},
      {title: 'Cloud Atlas'},
      {title: 'One Hundred Years of Solitude'}
    ]
  },
  {
    name: 'Beatrice',
    age: 42,
    favoriteBooks:[
      {title: 'Candide'}
    ]
  }
];