Kurz und gut! Danke an Flo für die Empfehlung.
Wow. It's not only the soulstamp concept that drew me in, it's the mechanics of plausibly altering the past, and the basic assumption that everything has a soul, an understanding of self, and a dream. Love it.
The first by Brandon Sanderson that I've read. A short read and a good story. Made me realize how books allow me to feel a spiritual world that I will never believe in in the real world. Great how our minds can run in different modes.