- Illustrated Chapter Books
- Ages 8–11
- Fantasy
Flember: The Crystal Caves
Book 2 of 5 in FlemberView the full series
A visually rich continuation that pushes Dev and Boja deeper into Flember Island's mysteries. Best read after book one, as it builds on the friendship, magic system and island mythology already introduced.
- Best for8–11
- FormatIllustrated
- Length288 pp
- Read aloud~4 hr5 min
The vibe
What it’s like.
Style
- Conversational
- Comedic
Tone
- Funny
- Adventurous
- Exciting
- Suspenseful
- Whimsical
Themes
Experience meters
What’s it about?
The story.
Dev and Boja's adventures continue as the mysteries of Flember Island open out beyond the workshop and into stranger, more dangerous places. The crystal caves bring a more quest-like shape to the series, with hidden spaces, magical discoveries and the sense that Flember is much larger and more powerful than Dev first understood. Jamie Smart keeps the pages full of jokes, expressive cartooning and energetic action, but this second book also deepens the adventure thread. The friendship between Dev and Boja remains the emotional centre: Dev's curiosity and inventiveness are balanced by Boja's loyalty, strength and comic charm. For readers moving from graphic novels into longer illustrated chapter books, the combination of short scenes, heavy artwork, fantasy setting and propulsive discovery makes the story feel generous rather than dense.
Fit check
Right for your child?
Where it lands by age
- 1
- 3
- 5
- 7
- 9
- 11
- 13
- Best fit · 8–11
- Read aloud · 8–11
- Independent · 8–11
Prose load
Moderate
Visual support
Very high
Reluctant-reader friendly
Very
Read-aloud quality
Strong
Works well for
- Reading aloud
- Reading together
- Reluctant readers
Nothing in the book is likely to concern most parents. Safe to recommend without preview.
Bedtime suitability
3 / 5 · Workable
Sensitive-child
3 / 5 · Mostly fine
Graphic intensity
1 / 5 · None
Best for
- Bunny vs monkey fans
- Robot friends
- Cave adventures
- Visual fantasy
- Illustrated adventure
Avoid if
- Has not read book one
- Prefers real world school comedy
- Needs very short reads
Particularly good for children who are…
- Reluctant reader
- Making friends
- Interested in science
- Struggling with reading
In the classroom
How it works in school.
A funny, inventive fantasy-adventure series — a reluctant-reader-friendly classroom-library pick.
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 kick is the deeper magic — Dev and Boja heading into the crystal caves, the Flember turning out to be much bigger and stranger than the workshop suggested. The Flember sequel where the island stops being a setting and starts being a mystery.
- Secret world
- Adventure and freedom
- Making a difference
- Friendship and belonging
Why parents love it
The Flember sequel where the world expands properly — crystal caves, deeper magic, the friendship-and-invention spine still doing the heavy lifting. Best read after book one; the mythology only matters once Dev and Boja feel familiar.
- Shared humour
- Beautiful illustrations
- Quick to read
In the series
Flember.
5 books · open the series →
About the author & illustrator
Jamie Smart.
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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