Cover of The Lost Hero

The Lost Hero

by Rick Riordan · Grades 5–9 · Fantasy

The Lost Hero by Rick Riordan is on US reading lists at grades 5–9. It appears on 2 lists: 2 book-award lists, across 6 states. Every citation below links to the primary source.

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Before you buy: Ages 10–14 · Grades 5–9. The button opens the print edition (ISBN 9781368051439). If the class uses a set edition or translation, match its ISBN first.

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Assigned across 2 curriculum lists · 6 states

#74 most-assigned book in America — on school reading lists in 6 states (2026-07-13 study of 13,258 assignments).

Grade placement varies by school — the median assigned book spans 4 grade levels (83% span three or more, across 13,258 source-cited assignments).

On reading-award lists:Pacific Northwest Young Reader's Choice AwardVolunteer State Book Award

This page shows where The Lost Hero is assigned in US schools — curricula, states, grades, and the primary-source citations behind each placement. Not a summary or study guide.

Reading level at a glance

Grade range
Grades 5–9
Age range
Ages 10–14
First published
2019
Genre
Fantasy
ISBN-13
9781368051439

Sources: grade range from the cited lists below, last checked 2026-07-07; pages and year from our catalog record (sources); reading time is an estimate at 250 words a minute.

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About this book

Book facts and sources (3)
On award reading lists
Series
  • Book 1 of 5 in The Heroes of Olympus (publication order) (source: Series book lists + publication order verified against publisher catalogs / Wikipedia. Checked 2026-06-29.)
Catalog record
First published 2019 (source: how we source book data)

Part of a series — read in order

Similar grade-level books

See all books like The Lost Hero→ — matched on theme + reading level.

Why it is assigned

This fantasy title is typically read at grades 5–9. Written in the 2010s; pairs with curriculum units on mythology and heroism; cited on 2 lists: 2 book-award lists.

Themes

mythology · heroism · memory

Where this book is recommended

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Common questions

What grade level is The Lost Hero?
The Lost Hero is listed for grades 5–9. It appears on 2 book-award lists across 6 states. Exact placement varies by school and district.
What curricula assign The Lost Hero?
The Lost Hero appears on reading lists for Pacific Northwest Young Reader's Choice Award, Volunteer State Book Award. Each assignment on this site links to its primary-source citation.
Is The Lost Hero banned in schools?
The Lost Hero has documented removals from at least one public-school district in 1 state (IA) per PEN America's Index of School Book Bans 2022-2024. Policies vary by district.
What themes does The Lost Hero explore?
Central themes in The Lost Hero include mythology, heroism, memory.

Why this book is on this list

How we classify

Each dimension below is sourced from a public reference. The full framework is documented on the classification standard page.

Lexile measure
Not classified — this book has no published Lexile measure.
Grade band
Grades 5–9 — drawn from the book-award lists citing this book.
Curriculum alignment
Cited in 2 curricula on this site (see “Where recommended” above for primary-source links).
State-level evidence
On state book-award lists in 6 states (see citations above).
Removal / banning records
Documented as challenged or removed in 1 state per PEN America’s Index of School Book Bans — see the full banned & challenged books list.
Seasonal / contextual tags
Tagged for: book-club, read-aloud.

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