The Non-Canon Expert explains how Grievous discovered that Dooku had been killed in his duel with Anakin and Obi-Wan, and describes how the scene played out in a way that left the Separatist General shocked and emotionless, embarrassing him in front of a Republic Lieutenant Commander!

This is a Legends story for Grievous from the Revenge of the Sith novelization by Matthew Stover. I hope that you enjoy it!