1. Log into PMI (you have to be a member to get the discount)
2. https://www.pmi.org/pmbok-guide-standards/foundational/pmbok — navigate to this page
3. scroll down – there are several codes — this one is for North America: PMBK50PCT
4. scroll to the bottom of the page for the purchase button and apply the code
I tried the code and the price came up at $49 something. Just didn’t really buy it.