library/pages/index.tsx

import React from "react";

import { getBook, DetailedBook } from "../lib/books";

export default function Home(props: Props) {
  return <p>{props.book.title}</p>;
}

interface Props {
  book: DetailedBook;
}

export async function getServerSideProps() {
  return {
    props: {
      book: await getBook(2),
    },
  };
}