I'm not sure any of the books I listed impacted me in a tangible, measurable way. At least not in the sense that I'd be such a terribly different person if I hadn't read them. But I'll give it a shot.
I had probably read/heard the Cain and Abel story hundreds of times when I first read East of Eden (in high school, I think). I had never really stopped to think about verse 4:7, though. I really embraced the idea that "thou mayest" master sin. Free will gives us the chance to choose evil, but it also gives us the chance to choose good. I love that idea. I don't think this contradicts some idea of total depravity or Romans chapter 3 (I'm not a Pelagian), but it reinforces ability (and responsibility) to choose.
I already believed this, but for years after I read East of Eden I framed it in Steinbeck's words (
timshel as "you may") whenever I thought about it.
I also think it's a good story told in an interesting way with a lot of humor and pathos that manages to convey its central meaning in a compelling manner.
The
Dostoevsky is even more vague in terms of direct changes in my life. I think it echoes some of the free will discussion from EoE, but mostly I'd say it serves as a perfect example of a work of fiction that provokes serious religious reflection. It's the kind of book I'd like to write if I could write that well (although my book would be much shorter and wouldn't use that frustrating Russian practice of giving every character 15 nicknames, patronymics, and titles).
I guess it was also a good look at a branch of Christian practice pretty far removed from my own (Eastern Orthodox vs. SBC).
I'm sure you'd be interested to know that I had typed a response to this that was lost when I accidently used the wrong tab to double-check my spelling and had to re-type everything. Let's all just imagine that the earlier response was much more insightful, easy to understand, and elegantly phrased than the redo.