- Series: Stewards of the Flame Series Record # 24135
- Sub-series of: Anthropological Service
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Note: According to the author's newsletter, this series was originally supposed to consist of just one sequence. However, based on reader feedback, it was split into two, "Hidden Flame" (volumes 1 and 2) and "Rising Flame" (volumes 3 and 4). The second sub-series can be read without having read the first sub-series although it spoils the latter. Although these books are set in the "Anthropological Service" universe, unlike the "Elana" books, they are aimed at adults and older teenagers as opposed to middle-school readers.
- Series Tags: science fiction (7)
- 2 Stewards of the Flame
- 1 Founders of Maclairn / 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 Captain of Estel / 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 Founders of Maclairn / Hidden Flame