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CollectionAges 9–12Illustrated Chapter Books

The Overthinkers' Club

A universe by Nat Luurtsema

A funny, warm-hearted illustrated diary series about a champion overthinker learning to wrangle her worries — reassuring wisdom wrapped in genuine laughs.

  • Series

    1
  • Books

    1
  • Best for

    9–12
  • Status

    Ongoing

At a glance

Primary creator
Nat Luurtsema
First book
The Overthinkers' Club: Happy List · 2026
Tone
Funny, Warm, Heartwarming, Thought provoking
Overall sensitivity
Low

The shape of it

The shape of this universe.

The Overthinkers' Club is Nat Luurtsema's funny, warm-hearted illustrated diary series about the anxious inner world of the tween years. It follows Birdie, a champion overthinker who spirals a tiny worry into full-blown catastrophe, as she and her friends try to outwit their anxiety with a 'Happy List'. Illustrated throughout by Cécile Dormeau, the books pair a witty, diary-style voice with genuine emotional insight, navigating starting secondary school, blended families, self-image and shifting friendships. It offers real laughs alongside gentle, reassuring wisdom about worry — a good fit for readers who love Lottie Brooks and Dork Diaries and for any young overthinker who could use a companion for the awkward stretch between childhood and the teenage years.

A funny, warm-hearted illustrated diary series about a champion overthinker learning to wrangle her worries — reassuring wisdom wrapped in genuine laughs.

Primary themes

Tone palette

  • Funny
  • Warm
  • Heartwarming
  • Thought provoking

The series

One way in.

Cultural footprint

A shelf of evidence.

Cultural ubiquity

2/ 5

A working classic for readers in the know.

Sensitivity

Low, and collection-wide.

LowCollection-wide

Content notes

  • Mental health

Across the collection

All 1 book.

About the creator

Nat Luurtsema.

Nat Luurtsema

Author

Nat Luurtsema: comedian-turned-author whose funny, big-hearted diary-style stories give nine-to-twelve-year-old overthinkers real laughs and gentle wisdom about worry and growing up.

More from Nat Luurtsema
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