- Comedy
- Mac Barnett collection
- Ages 4–8
The Shape Trilogy
Part of the collectionMac Barnett→A deadpan philosophical trilogy in three shapes, funny, strange, and unexpectedly profound for 4–8s.
- Books3 / 3
- Arcs1
- Span2017–2019
- StatusComplete
The series
At a glance.
Three picture books with Jon Klassen, Triangle (2017), Square (2018), Circle (2019), built around the simplest possible cast (three geometric shapes) and weighted, deadpan dialogue about identity, art and what's behind the waterfall. Klassen's flat colour and quiet stares are central; the books work as one short philosophical sequence. Caldecott-discussed; widely used in early-years art education.
A deadpan philosophical trilogy in three shapes, funny, strange, and unexpectedly profound for 4–8s.
Primary themes
Overall tone
- Funny
- Whimsical
- Gentle
- Thought provoking
Read in order; the trilogy has a slow accumulating logic.
One arc
The shape of the series.
- INarrative arcLow sensitivity
Triangle, Square, Circle
Three picture books with the same three shape-characters, each turning over a small philosophical question.
Triangle pranks Square; Square gets accused of being a sculptor; Circle leads a hide-and-seek into the dark behind a waterfall. The three are designed to be read as a sequence and reward careful re-reading.
Fit check
Right for your reader?
Where the series lands by age
- 1
- 3
- 5
- 7
- 9
- 11
- 13
- 15
- 17
- 19
- Best fit · 4–8
- Read aloud · 4–8
- Independent · 6–8
Reluctant-reader friendliness
Very high
Read-aloud quality
Excellent
Adult crossover
High
Grows with the reader
Designed to
Sensitivity envelope
Low overall, and consistent.
In the same universe
Sister series.
Six chapter books (Mac Undercover 2018 through Mac Saves the World 2022) framed as a memoir of Mac Barnett's stint as a child spy for the Queen. Illustrated thr…
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Open series →About the author