Once I got a little bit older, I read Silent to the Bone. This one is for a more mature audience and has an important message: When you know something is wrong, don't be afraid to speak up. This book is much heavier than her others, but I enjoyed it.
I've never met E.L Konigsburg, and therefore can't truthfully say she is a lovely lady, but I sure wouldn't doubt it. May she rest in peace, and let her wonderful books continue to be appreciated.