- Series: Meg Murry Series Record # 4175
- Sub-series of: Kairos
- Webpages: Wikipedia-EN
- Series Tags: unicorns (2), into-movie (2), coming of age (2), child prodigy (2), good and evil (2), female protagonist (2), young-adult fantasy (2), young-adult sf (2), time travel (2), telepathy (2), new england (1), young-adult time-travel (1), tesseract (1), aliens (1), kidnapping (1), into-play (1), into-opera (1), juvenile sf (1), Abebooks: 50 Essential SF Books (1), twins (1), Anatomy of Wonder 1 Core Collection (1), family (1), contemporary (1), adolescent protagonists (1), strong female character (1), teachers (1), love (1), mitochondria (1), cherubim (1), disease (1), humanoids (1), Poetry (1)