- Series: Hal Junior Series Record # 30521
- Sub-series of: Hal Junior / Hal Spacejock
- Series Tags: juvenile sf (5)
- Hal Junior
- 1
The Secret Signal (2011)
by
Simon Haynes
also appeared as:
- Translation: Il segnale segreto [Italian] (2014)
- 2 The Missing Case (2012) by Simon Haynes
- 3 The Gyris Mission (2012) by Simon Haynes
- 4 The Comet Caper (2018) by Simon Haynes
- Hal Junior Omnibus One (2018) [O/1,2,3] by Simon Haynes
- 1
The Secret Signal (2011)
by
Simon Haynes
also appeared as: