Which book do you have?

Pick your book to open the camera. If it won't find the cover, the tips below usually fix it.

Tips for a good scan

Use good light
Sit near a window or a lamp. Avoid glare on the cover, and don't scan in the dark.
Show the whole cover
Hold your phone about 30 cm away so the full front cover fits inside the frame.
Allow the camera
iPhone (Safari): tap aA in the address bar, then Website Settings, Camera, Allow. Android (Chrome): tap the icon left of the address, then Permissions, Camera, Allow.
Use your browser
Came from WhatsApp, Instagram or Facebook? Tap ⋯ or the share icon and choose Open in browser. Use Safari on iPhone or Chrome on Android.