My daughter is unable to open and download books on her recently purchased Kindle Fire 7. Please advise.
Welcome to the forum! Check for any available updates (Settings > Device options > System Updates) and restart the tablet. If the problem persists, restart your router by unplugging it for a few minutes, plug it back in, let it start up and try again. If that doesn't help, try a different WiFi network.
Let us know if any of those suggestions resolve your issue!