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The Hal Spacejock Series (Teen/Adult)


New Release!

H2 2018

30,000 words, 180 pages, Illus

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Teacher's notes

Hal Junior: The Secret Signal

1) The Secret Signal2) The Missing Case3) The Gyris Mission

"A thoroughly enjoyable read for 10-year-olds and adults alike."
The West Australian

"Sure to entertain and delight any fan."
Midwest Book Review

"The story zips along with lots of laughs, mysteries and adventure."

Australian author Simon Haynes is best known for the Hal Spacejock series, originally published by Fremantle Press and distributed by Penguin Australia. He was working on the fifth Spacejock title when he decided to write a science fiction series for younger readers.

The Hal Junior series is written in a similar style to the adult Hal Spacejock books, except the Hal Junior titles are shorter and feature a younger protagonist. In other words, most adults will enjoy these books too!

Synopsis: Hal Junior lives aboard an orbiting space station. His mum is chief scientist, his dad cleans air filters and his best mate is Stephen 'Stinky' Binn. As for Hal ... he means well, but his wild schemes never quite turn out as expected!
During a tour of a visiting freighter, Hal Junior uncovers a secret which endangers the space station and all who live there. How will he warn everyone? With a Secret Signal, of course ... but will they believe him?

Hal Junior: The Secret Signal features mayhem and laughs, daring and intrigue ... plus a home-made space cannon!


No swearing and no adult concepts ... just good clean fun.

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Frequently Asked Questions (Updated October 2011)

How long is this book?
About 29,000 words - 200 pages - with 42 small illustrations, diagrams and sight gags.

What's it like?
The Secret Signal has been described as 'Dennis the Menace in space' and 'Just William in space'. It's an adventure, a thriller and a comedy all rolled into one. There's no swearing and no adult concepts ... just good clean fun.

What's the intended audience?
Readers aged 9-12, and adults who still remember their inner child. Children in upper primary school (middle grade and/or middle school) will really like it. It should also prove popular with older readers who still enjoy fun and adventure.

What are the reading levels/readability grades for this book?
Kincaid: 3.5 * ARI: 3.8 * Coleman-Liau: 9.1 * Flesch Index: 88.9/100 * Fog Index: 6.1 * Lix: 26.6 = below school year 5 * SMOG-Grading: 6.8

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Publication Details

Title: Hal Junior: The Secret Signal by Simon Haynes
Publisher: Bowman Press
Kindle Ebook ISBN: 978-1-877034-01-5
Smashwords Ebook ISBN:

Format: Format: Trade Paperback, 5.25"x8", 186 pages
Paperback ISBN: 978-1-877034-07-7


Science fiction for kids

Junior science fiction for ages Readers aged 9-12

Novels for boys who don't like to read

Science Fiction novels for middle school

Reluctant Readers

Australian Author


Hal Junior is a funny, action-packed science fiction series intended for Readers aged 9-12 (middle grade/middle school/upper primary), but most adults will also enjoy these books.

Early feedback included the following comments:
"This would be a fantastic series for boys, especially reluctant readers."
"My boy loved the dishwasher scene."
"It's hard to find a funny science fiction series for kids, but this does the job nicely."