Her LA Times obit ...
A nice profile, about 7 years old
An interview, last year.
One of the Christians I wholly admired. From the interview:
Did you see there are several books coming out refuting “The Da Vinci Code”?
L'Engle: That’s silly. It takes too much energy to be against something unless it’s really important. Now if you’re against evolution, that’s important.
I stopped reading her as an adult, and then started again when my kids started reading her. She holds up really well across the years.