Sometimes a book just isn't enough. In this area we provide additional resources for most of our textbooks including code samples, additional material and errata.
| References |
| If you just need to look something up, a theorem or method that you just can't seem to remember, our reference section has listings for geometry, algebra, HTML, CSS and JavaScript. If you can't seem to find what you're looking for by browsing around, try looking it up in our search page. |
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| Errata |
| If you've found something in one of our books that just doesn't look right, look up the book on our errata page and see if we've listed a correction. |
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