Book 3 of the Time Quintet series. The story continues only this time Charles Wallace takes center stage. This book has less similarities with the previous book and to me is a great precursor to the TV show Quantum Leap. That said, it is engaging and reads more like a series of short stories with a common thread. That is not to say it is anything but superbly laid out and masterfully written. Just be aware this is harder to follow than the previous books.