What reading level is All that's missing?

All that's missing by Sarah Sullivan is at a Level 3 reading level (Lexile 550L). Recommended for Lower Grades readers (Ages 5-8).

What age is All that's missing appropriate for?

All that's missing is recommended for Ages 5-8. HootRating: 8ME (Moderate — Emotional).

What genre is All that's missing?

All that's missing is fiction — Juvenile Fiction.

Does All that's missing have any content warnings?

All that's missing has a HootRating of 8ME (Moderate — Emotional). No specific content flags noted. On HootRated, every book is rated across four dimensions — emotional, physical, social, and thematic — to help parents make informed choices.

How many pages is All that's missing?

All that's missing by Sarah Sullivan is 358 pages.

Reviewed by HootRated editorial · Last updated May 18, 2026

All that's missing

Sarah Sullivan

All that's missing

Age Rating, Reading Level & Content Guide

by Sarah Sullivan

Reading Level 3 8ME Ages 5-8 Heads Up

The text is written at a 3rd grade reading level, the subject matter is intended for younger children (ages 5–8), and the content has moderate intensity with some emotionally heavy themes.

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About This Book

The soft creak of the old rocking chair fills the quiet room, mingling with the faint scent of grandma’s lavender soap. Arlo feels the gentle weight of a secret he must protect, even as the world around him starts to change. What will happen when he sets out to find the family he barely knows?

Themes

Foster ChildrenFamiliesGrandparent and ChildDementiaJuvenile Fiction

Quick Assessment

This gentle fiction explores the challenges of dementia through the eyes of young Arlo, a child in foster care who strives to care for his grandfather while navigating family connections. Suitable for early readers aged 5-8, it sensitively addresses themes of memory loss, family bonds, and foster care without overwhelming young readers. Parents should note the depiction of dementia and family separation, presented with warmth and hope.

Why we rated All that's missing 8ME

All that's missing is written at a Level 3 reading level with a Lexile measure of 550L across 358 pages. Strong independent readers around grade 4.0 can typically handle this book on their own; with parent or teacher support, All that's missing works for readers up to grade 5.0.

We rate All that's missing as 8ME ("Moderate — Emotional") because the content sits in the "Moderate" range — moderate conflict that may involve loss, scary scenes, or interpersonal stakes. The strongest signals come from emotional weight — these are the dimensions parents should evaluate against their reader's tolerance.

No specific content flags were raised by community reviewers, which is consistent with the moderate intensity score.

Thematically, All that's missing explores foster children, families, grandparent and child, dementia, and juvenile fiction — these threads give the book room to mean different things to different readers.

Good fit for

✓ Children in the Ages 5-8 range — the maturity and attention span match the story's pacing.
✓ Patient readers who enjoy slower, character-driven stories.
✓ Kids drawn to stories about foster children, families, grandparent and child.

Maybe not for

! Readers who get easily upset by emotional or moderately dark scenes — the conflict here is real, not just background flavor.
! Reluctant readers who need a fast hook — the pacing here rewards patience.