Climb up the crack to the left of Sekundant to reach a nice little ledge. Then move right a little and climb the crack there. Super fun moves on good holds the whole way to the top. You can climb this route completely "clean" (without bolts) if you want.
Between Pfeilerkante and Sekundant
In the book it says it's bolted, but I only found 2... Maybe I didn't see them or got off route, but I was able to protect the rest with hand-sized cams. There's an anchor at the top.