Fletcher Dunn recently tweeted that the book 3D Math Primer for Graphics and Game Development is now available for free at https://gamemath.com/.
Vectors & matrices, representing orientation in 3D, graphics & physics basics, and more. Beginner to intermediate level.
Remastered to be web & mobile friendly!
The 14 chapter book was originally published in 2011, which might feel old enough to be irrelevant in what is supposed to be a fast-paced, technology-driven industry, but as the site says, “… we’re proud to say that most of the material in this book, like Bilbo when he still had The Ring, hasn’t aged a day. Vectors and matrices work the same way, F still equals ma, and people still use Blinn-Phong.”
And while the title says “Game Development” in the name, it’s also a useful reference for non-game uses. I can imagine unlocking some amazing data visualization techniques by leveraging the knowledge in this free resource.
It is currently available on the website and is meant to be web and mobile friendly, but it sounds like there are plans to create a PDF version as well.