Your book won't open on your Kindle Keyboard, or there's an error when you try to open a book.
Before you perform these steps, make sure that your Kindle Keyboard is connected to a wireless network. To learn more, go to Add a Wi-Fi Network Manually to Your Kindle E-Reader.
There may have been an error with downloading the book. Remove the title from your device, restart your device, and then download the book again.