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← Book guides

Classroom lists

Books from published school reading lists, grouped by unit and ordered from lighter to heavier reading effort.

Each published unit has at least eight books with certified guides. These lists compare reading demands and content; they do not assign grade levels.

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Sources and method

Unit groupings are Collected’s selection from the published reading lists below, guided by each book’s recorded subjects and themes. They are not claims that every district teaches the books together.

Reading effort starts from writing, ideas, structure and background knowledge, each scored 1-5, then adjusts for pace and length, into a 0-100 score. It describes reading demand, not literary quality, age suitability or emotional intensity. Page counts refer to the edition in each guide and vary between editions.

Content notes use the guide’s six categories. Every category marked strong or mild is shown; categories marked none are left out. Missing information is not treated as none.

Book details last checked November 3, 2026.

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