Books like Just Like Millie

Looking for books like Just Like Millie by Lauren Castillo (Picture Book · grades K–3)? It’s most often read for its themes of friendship, courage, and kindness. The 10 titlesbelow are the closest matches in the ReadingList database — each scored on shared themes, genre, and reading level, and each linked to the curricula, states, and grades where it’s assigned, with primary sources.

These are reading-level matches, not just topical ones — so the picks stay grade-appropriate for a grades K–3 reader. See how we judge text difficulty on our methodology page.

10 books similar to Just Like Millie

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Why each is a match

I Lived Inside a Whalegrades K–3
Shares themes of friendship and kindness, same genre (Picture Book), and overlapping grades (K–3).
Knight Owlgrades K–3
Shares themes of friendship and courage, same genre (Picture Book), and overlapping grades (K–3).
Knight Owl and Early Birdgrades K–3
Shares themes of friendship and courage, same genre (Picture Book), and overlapping grades (K–3).
Corduroy600L
Shares themes of friendship and kindness, same genre (Picture Book), and overlapping grades (K–3).
The Giving Tree530L
Shares themes of friendship and kindness, same genre (Picture Book), and overlapping grades (K–5).
A Mischief of Micegrades K–3
Shares themes of friendship, same genre (Picture Book), and overlapping grades (K–3).
Because of You, John Lewisgrades 3–5
Shares themes of courage, same genre (Picture Book), and overlapping grades (3–5).
Buffalo Fluffalogrades K–2
Shares themes of friendship, same genre (Picture Book), and overlapping grades (K–2).
Dogtowngrades 3–6
Shares themes of friendship and courage and overlapping grades (3–6).
Gibberishgrades K–3
Shares themes of friendship, same genre (Picture Book), and overlapping grades (K–3).

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