I notice you're asking for content related to The Monsters Know What They're Doing (a popular tactical guide for D&D monsters by Keith Ammann) and a specific site, PDFCoffee, which hosts unauthorized copies of copyrighted material.
The Monsters Know What They're Doing — Spy & Owl - Keith Ammann the monsters know what they 39-re doing pdfcoffee
Keith Ammann’s work is not a massive corporate product like a Wizards of the Coast rulebook. It is a single author’s labor of love. Piracy hurts him directly. Moreover, the PDFCoffee version is —poor quality scans, missing errata, no hyperlinks, and malware risks. I notice you're asking for content related to