- Series: Anthropological Service Series Record # 63287
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Note: According to the author's introductions, the "Elana" sub-series" is aimed at middle-school readers while the "Flame" sub-series is aimed at adults and older teenagers.
- Series Tags: science fiction (7), Anatomy of Wonder 1 Core Collection (1)
- Anthropological Service
- 1 Elana
- 1 Enchantress from the Stars (1970) by Sylvia Louise Engdahl [also as by Sylvia Engdahl]
- 2 The Far Side of Evil (1971) by Sylvia Louise Engdahl [also as by Sylvia Engdahl]
- 2 Stewards of the Flame
- 1 Hidden Flame
- 1 Stewards of the Flame (2007) by Sylvia Louise Engdahl [only as by Sylvia Engdahl]
- 2 Promise of the Flame (2009) by Sylvia Louise Engdahl [only as by Sylvia Engdahl]
- The Hidden Flame (2016) [O/1,2] by Sylvia Louise Engdahl [only as by Sylvia Engdahl]
- 2 Rising Flame (Sylvia Engdahl)
- 1 Defender of the Flame (2013) by Sylvia Louise Engdahl [only as by Sylvia Engdahl]
- 2 Herald of the Flame (2014) by Sylvia Louise Engdahl [only as by Sylvia Engdahl]
- 3 Envoy of the Flame (2021) by Sylvia Louise Engdahl [only as by Sylvia Engdahl]
- The Rising Flame (2016) [O/1,2] by Sylvia Louise Engdahl [only as by Sylvia Engdahl]
- 1 Hidden Flame
- 1 Elana