. It is available for purchase or rental through major retailers: Control.com A Guide to the Automation Body of Knowledge
While you might find a forum post with a Google Drive link, the risk of using an unverified file for professional engineering work is too high.
Nicholas P. Sands (Editor/Lead Author) Publisher: International Society of Automation (ISA)
: A popular platform for purchasing the ABoK 3rd Edition eTextbook , often at a lower price than print.
When you open the PDF, prioritize these updated sections:
(The bulk of the update)