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The mission of OpenIntro is to make educational products that are free, transparent, and lower barriers to education. Teachers can rest easy with our textbook, knowing that

students can easily access the textbook before the course even starts,
every student will have a copy of the textbook,
physical copies are sold on Amazon for $25 for a B&W version (color version is $40),
students will always have access to their course textbook, including future editions for free, and
we offer a variety of additional resources, including videos and software labs, for free on openintro.org.

Self-study learners will be excited to find that

they are in good company, since OpenIntro is used by many people outside of regular courses, and
additional resources are provided on openintro.org to help hone skills and knowledge, including videos and labs.

Developers can find the source files for this textbook on GitHub, which are available under a Creative Commons BY-SA license.

OpenIntro is driven by passion, and we're excited to now host a copy of our textbook on LeanPub to allow readers to, if they wish and can afford to, contribute funds back to the project to help us expand our outreach efforts.

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Kick off your book project, get started with GhostAI, get better at marketing, or spend the day doing all three! Free live workshops on Zoom. Saturday, June 27, 2026.

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