1. Follow our guide for side-loading the Google Play store app onto your Fire tablet. You’ll want Google Play, and not just the Nook app itself, to perform updates. 2. Tap Play Store. 3. Sign into your Google Play account. 4. Type Nook in the search field.  5. Tap Nook. 6. Tap Install. 7. Tap Open. 8. Tap Create Account or Sign In to get into your Nook app.