Check with someone who has read Coal and Rain before you read them. L'Engle puts some *ahem* stuff in her adult fiction sometimes, and it's best to stay away from those books. For example, House Like a Lotus has a lesbian couple, I believe, and it gets graphic. :-P Same with another book, I think. And I wouldn't recommend Camilla. There is another one I ran across with a not-good scene. I think it was Rain, now that I think of it. I get the titles mixed up. Anyway, if that is the one, there is a children's version (same story, but shorter and without the junk) called Prelude that is just fine.

L'Engle also writes some nonfiction. I LOVE her Crosswicks Journals. The first is called A Circle of Quiet. There are four total. They are SO good! She's Anglican and has different beliefs than I do, but much of what she says is insightful and relavant.