This was a later book in the series, but was written as a prequel. I read it first, before any of the other books.
It’s…okay, I guess? Clearly, it’s exposition. Lewis is trying to clean up a bunch of details and set the stage for what comes next. I sort of knew that going in, so I read it in that respect.
I didn’t get a lot out of it, I guess. The story is very shallow, and it’s clearly a novel for kids. It’s an order of magnitude simpler than Harry Potter.