I'm a student, so I don't have nearly as much time for leisure reading as I'd like. If I manage to read an entire course book instead of just the assigned chapters, I'll review that here, too.
This book is exactly what it looks like.
The timeline is out of whack, though, and the twins don't sleep for 2-5 days (depending on whether you count what's described or what's stated), which doesn't slow them down. /nitpick
I did love the personalities and interactions between Oliver and Celia and the adults in their life.