message: docs(aio): add angular-buch to resources
  adds a link to the website of our book. second version of the text. thanks!
  PR Close
diff: "url": "https://gumroad.com/l/essential_angular"
  },
  "angular-buch": {
  - "desc": "The first German book about Angular 4+. Amazon Bestseller of 2017. Available in printed and electronic format (Kindle, PDF, ePub and Mobi). All sources are available on GitHub.",
  + "desc": "The first German book about Angular. It gives you a detailed practical overview of the key concepts of the platform. In each chapter a sample application is built upon with a new Angular topic. All sources are available on GitHub.",
  "logo": "https://angular-buch.com/assets/img/brand.svg",
  "rev": true,
  "title": "Angular-Buch (German)",
  