「飛空士」シリーズ, lit. [i]Pilot Series[/i] is a series of novels written by Inumura Koroku and illustrated by [[Morisawa Haruyuki]], all of which are set in the same universe. The novels are published by Shogakukan under their Gagaga bunko imprint and, as of March 2014, 13 volumes, spanning four separate stories, have been released.

h4. List

* [[Toaru Hikuushi e no Tsuioku]] (1 vol., 2008)
* [[Toaru Hikuushi e no Koiuta]] (5 vols., 2009–2011)
* [[Toaru Hikuushi e no Yasoukyoku]] (2 vols, 2011)
* [[Toaru Hikuushi e no Seiyaku]] (5 vols., 2012–ongoing)
hikuushi series