- Series: The Custard Protocol Series Record # 38390
- Sub-series of: The Parasol Protectorate Universe
- Series Tags: steampunk (6), werewolf (2), airships (1), kidnapping (1), misadventures (1), secrets (1), india (1)
- 3 The Custard Protocol
- 1 Prudence (2015) by Gail Carriger
- 2 Imprudence (2016) by Gail Carriger
- 3 Competence (2018) by Gail Carriger
- 4 Reticence (2019) by Gail Carriger
- Prudence (excerpt) (2015) [SF] by Gail Carriger
- Prudence (excerpt) (2017) [SF] by Gail Carriger