|Book(s)|| A Clash of Kings (mentioned)|
A Storm of Swords (mentioned)
A Feast for Crows (mentioned)
In A Clash of Kings, Erren is mistakenly referred to as Ser Errol.
A Clash of Kings
After the death of Renly Baratheon beneath Storm's End, Ser Erren and Ser Parmen Crane were sent by Stannis Baratheon to Bitterbridge to retrieve the better part of Renly's army, made up of foot soldiers. Ser Erren and Ser Parmen were captured by the Tyrells at Bitterbridge.
A Storm of Swords
A Feast for Crows
Ser Erren continues to be imprisoned at Highgarden.