When Michael would return from a long trip, he’d often offer the most cursory account of it. That’s all we’d get for weeks. “I’m not ready to talk about it.” He’d talk around it, though, until he had processed his travels enough to understand and contextualize them. Then he’d talk about the trip in that context.
I think I do that sometimes with books. I’m reading a book I find I don’t care to talk about. My reading of it is like an important, long trip that could change my perspective. I’m also reading (rereading, it so happens) another book, though, that I process another way: I talk and write about it. That “outer” book may be part of my means of processing the “inner” book. At some point, the “outer” book could become a setting, and the “inner” book a stone.