The Miscalculations of Lightning Girl
by Stacy McAnulty
A funny, honest middle-grade novel about a math prodigy with OCD learning that friendship can't be calculated.
The story
Twelve-year-old Lucy Callahan was struck by lightning at age eight and woke up a math savant — along with a case of germaphobia, intrusive thoughts, and a ritual of sitting-standing-sitting she can't shake. Homeschooled ever since, she's ready to skip middle school entirely and head for college. Her grandmother has other plans: one year in seventh grade, one friend, one activity, and one book that isn't a math textbook. In a school with lockers that need cleaning, a sick shelter dog that needs saving, a new friend whose loyalty wobbles at exactly the wrong moment, and a math teacher who knows more than he's letting on, Lucy learns that the most important problems in her life can't be solved with equations.
Age verdict
Best fit for 10-12. Works well for 9 with a patient reader and for 13 for readers who like quieter emotional stories.
Our take
balanced_quality
What stands out
Each audience's top 3 dimensions. Out of 30 scored per book.
Kids love
- Character voice Exceptional
pi digits, compulsive numbering, ritualized phrasing. Voice is identifiable across 300+ pages. Sits at/above: voice specificity rivals City Spies's five-voice differentiation; emotional authenticity matches Monster Calls.
- Heart-punch Exceptional
Comparable to A Monster Calls and Tristan Strong Punches a Hole in the Sky , triangulated — Lucy's emotional peaks (shelter-dog euthanasia threat, public math-class breakdown) land with equal authenticity. Animal control climax achieves vulnerability without performance. Sits at: equal emotional intensity to both 10-level anchors.
Parents love
- Emotional sophistication Exceptional
Comparable to A Monster Calls and Charlotte's Web , triangulated — Anxiety, loneliness, betrayal-ache, pre-grief (sick animal) held simultaneously without simplification. Lucy's emotional journey matches both anchors' complexity. Sits at: equal emotional sophistication; vulnerability is specific and unperformed.
- Writing quality Strong
Comparable to A Snicker of Magic and A Monster Calls , triangulated — Clean prose, precise emotional rendering, show-don't-tell interiority throughout. McAnulty's craft is quiet and assured. Sits below: emotional sophistication equivalent, but sentence-level musicality less pronounced than Snicker's rhythmic artistry.
Teachers love
- Empathy & self-awareness Exceptional
Comparable to A Monster Calls and Amal Unbound , triangulated — Readers live inside anxiety and OCD authentically. Lucy's vulnerability (silent in crisis, explicit when safe) models emotional honesty. Sits at/above: neurotypical-accessible, equally empathy-generating; perhaps more classroom-appropriate than Calls.
- Cross-curricular value Strong
four cross-curricular connections vs. Golem's seven-planes depth.
✓ Perfect for
- • Kids who love realistic fiction with big feelings
- • Math-curious readers and STEM-identified girls
- • Readers who see themselves in anxious, germaphobic, or ritual-bound narrators
- • Animal-rescue fans
- • Families looking for a gentle, respectful OCD representation
Not ideal for
Readers who want nonstop action, laugh-on-every-page humor, or a tidy feel-good story without any emotional bruising.
⚠ Heads up
At a glance
- Pages
- 304
- Chapters
- 47
- Words
- 50k
- Lexile
- 530L
- Difficulty
- Easy
- POV
- First Person
- Illustration
- None
- Published
- 2018
- Publisher
- Random House Books for Young Readers
Mood & style
You'll know it worked when…
Readers who connect with Lucy's voice in the first three chapters will finish; readers who want external plot momentum may drift in the middle.
If your kid loved this
Matched across 30 dimensions — interest hooks, character appeal, tone, pacing, emotional core. Not by what other people bought. By what fits the same reader profile.
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The Boy at the Back of the Class
by Onjali Q. Raúf
Same genre (realistic fiction). Both hopeful in tone
Maybe He Just Likes You
by Barbara Dee
Same genre (realistic fiction). Both hopeful in tone
The One Thing You'd Save
by Linda Sue Park
Same genre (realistic fiction). Same emotional weight (moderate)
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