The 6th Edition was published in October 2011 and is widely available.
Before diving into where to find it, it is important to understand why this specific book is in such high demand. C-- Primer 6th .pdf Github
If you're looking for a downloadable PDF version of C++ Primer 6th edition, you might have come across some Github repositories claiming to host the book. However, we must advise you to exercise caution when downloading PDFs from unverified sources. The 6th Edition was published in October 2011