- Graphic Novels
- Ages 8–12
- Science Fiction
5 Worlds: The Cobalt Prince
Book 2 of 5 in 5 WorldsView the full series
A strong second volume that expands the world and deepens the team dynamics. Best after The Sand Warrior, especially for readers who like sibling conflict, secret plots and fast-moving graphic fantasy.
- Best for8–12
- FormatGraphic
- Length256 pp
- Read aloud~2 hr
The vibe
What it’s like.
Style
- Conversational
Tone
- Exciting
- Adventurous
- Suspenseful
- Thought provoking
Themes
Experience meters
What’s it about?
The story.
After lighting the first beacon, Oona Lee and her friends must travel to Toki, the blue planet, to continue their desperate mission to save the Five Worlds. Oona has to face the sister who left her, while An Tzu's mysterious illness worsens and Jax has to discover whether being a starball hero means anything when real danger arrives. The Cobalt Prince keeps the series moving at a furious pace but adds more emotional texture, especially around family, loyalty and the difficulty of trusting new allies. The art remains a major part of the appeal, giving each planet its own colour, culture and energy. This is not a casual standalone graphic novel: it is a true continuation, designed for readers already invested in the beacon quest and ready for a bigger conspiracy.
Fit check
Right for your child?
Where it lands by age
- 1
- 3
- 5
- 7
- 9
- 11
- 13
- Best fit · 8–12
- Read aloud · 7–11
- Independent · 8–12
Prose load
Light
Visual support
Very high
Reluctant-reader friendly
Very
Read-aloud quality
Workable
Works well for
- Reluctant readers
Preview before sharing if a child is sensitive to: violence, scary imagery, illness or disability.
Bedtime suitability
1 / 5 · Wide awake
Sensitive-child
2 / 5 · Use judgement
Graphic intensity
4 / 5 · Notable
Best for
- Epic graphic novel
- Sci fi fantasy
- Team quest
- Sibling conflict
- Visual worldbuilding
Avoid if
- Very sensitive to peril
- Prefers standalone books
- Prefers realistic stories
Particularly good for children who are…
- Reluctant reader
- Struggling with reading
- Illness in family
In the classroom
How it works in school.
An immersive sci-fi adventure series that keeps reluctant readers turning pages — a classroom-library favourite.
A book children love that happens to support school — never a stand-in for the texts a class is taught with. Reviewed for the classroom · June 2026.
Why it lands
Why they love it.
Why kids love it
The specific weight is Oona facing her sister — travelling to Toki the blue planet, An Tzu's illness worsening, Jax having to find out whether starball-hero status means anything when real danger comes. The second 5 Worlds where family loyalty becomes the harder problem than the quest itself.
- Adventure and freedom
- Going on a quest
- Magic powers
- Making a difference
- Secret skill
Why parents love it
The 5 Worlds continuation — family and trust and difficult-allies the new emotional weight, Toki giving Mark Siegel a fresh palette to work in. A true continuation rather than a casual standalone; needs The Sand Warrior first. Art still the major draw.
- Beautiful illustrations
- Conversation starter
- Quick to read
In the series
5 Worlds.
5 books · open the series →
About the creators
About the creators.
If you liked this
Three ways out of this book.
If you liked this, try…
Lateral matches. Same shelf, different texture.
Come into this from…
Easier or preparing reads — perfect lead-ins.
Where to go next…
Escalation reads — a step up in scale, silliness, or stakes.
Buy or borrow
Pick up a copy.
- Bookshop.org ↗
- Waterstones ↗
- Amazon UK ↗
- Hive ↗
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