books-service.ts

import 'rxjs/add/observable/of';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs/Observable';

import { Book } from '../models/book';

@Injectable()
export class BooksService {
  getBooks(): Observable<Book[]> {
    return Observable.of([
      {
        title: 'The Stand',
        authors: [ 'Stephen King' ],
        publishDate: '2008-06-24',
        description: `
        A patient escapes from a biological testing facility,
        unknowingly carrying a deadly weapon: a mutated strain
        of super-flu that will wipe out 99 percent of the world’s
        population within a few weeks.
        `,
        thumbnail: 'http://books.google.com/books/content?id=UbfnTcmkaKkC&printsec=frontcover&img=1&zoom=5&edge=curl&source=gbs_api'
      }
    ]);
  }
}