Stars Above by Marissa Meyer is a book containing 8 short stories relating to Cinder and her friends, as well as the epilogue for The Lunar Chronicles.
This book contains:
The Keeper-Michelle Benoit and her journey with Princess Selene
Glitches– Prequel to Cinder
The Queen’s Army– Prequel to Scarlet
Carswell’s Guide to Being Lucky– Prequel to Cress
After Sunshine Passes By– A peak into how Cress ended up on the satellite and just how good of a hacker she is
The Princess and the Guard– Prequel to Winter
The Little Android– Marissa Meyer’s retelling of “The Little Mermaid” by Hans Christian Andersen
The Mechanic– When Prince Kai and Cinder first meet, from Prince Kai’s perspective
Something Old, Something New-Epilogue