Open Textbook Library

open.umn.edu ↗

Open textbooks for higher-education subjects

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SI Score: 70/100
Pricing: Free AI reading, not confirmed
Free plan: Not confirmed
Sign-up required: Not confirmed

reference-library open-textbooks

Ask SI about Open Textbook Library

Answers use saved listing facts and recorded sources.

What it does

The Open Textbook Library provides textbooks licensed for free use and adaptation, with subject browsing.

Browse the subject area and inspect a book before deciding whether it fits your course or study plan. The library emphasizes permissions to use and adapt textbooks, making it relevant to educators as well as readers. Keep the chosen book's license and edition with any adaptation notes.

Sources

Open Textbook Library (Oct 26, 2026)

SI Score

70/100

#70 in Reference

Based on published information. No hands-on task test.

Method 2.0 · Published source review Assessed Oct 26, 2026Score ceiling for this evidence: 84/100.

Product usefulness 70

Evidence

Higher-education textbook selection and adaptation are documented educational uses.

Limits: AI review of saved source passages. No hands-on test, human approval or automatic-provider checker receipt.

Source links and check dates are in Sources and checks below.

Separate website checks

These checks do not add points to the SI Score. They inspect the website's HTML, not the product in use.

Basic website checksunknown

No check recorded.

HTML accessibility checksunknown

No check recorded.

Homepage HTML responseunknown

No check recorded.

Trackers in homepage HTMLunknown

No check recorded.

Page date hintsunknown

No check recorded.

Policy links do not verify a company's conduct. An HTML response time is not application speed. Tracker and accessibility checks miss behavior after page load. Copyright dates do not prove product upkeep.

How the SI Score works →

Unconfirmed details may be unassessed, absent from the pages checked or temporarily unreadable. A missing price does not mean the service is free.

Sources and checks

Supporting pages for product usefulness, site facts, prices and separate website checks. Each record keeps its own date. Reading a page does not establish how well the product performs in use.

open.umn.edu/opentextbooks
- PricingAI reading, not confirmedChecked Oct 26, 2026
  The library states that its open textbooks can be downloaded, edited and distributed at no cost.
- Product usefulness evidenceChecked Oct 26, 2026

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