My Friend, My Enemy is the 19th chapter of Inheritance. It takes the point of view of Roran.
Summary[]
Roran wakes up in the middle of the night as an intruder enters his tent. The two fight and Roran kills the other man who continually claims to be a friend. Outside, Roran talks with his men who begin to search the camp for other assassins. Carn finds a cut across Roran's chest and then heals the wound with magic.