VectorCertain LLC today announced the completion of manuscript-prep for The MYTHOS Playbook, a 34-chapter, 9-appendix technical reference designed for CISOs, security architects, and AI governance program leads operationalizing the new joint Five Eyes guidance on agentic AI security. The book closes its 17-sprint development cycle today and proceeds to June 2026 publication. A pre-order landing page is live at vectorcertain.com.
On May 1, 2026, six national cybersecurity agencies representing all five Five Eyes nations jointly published "Careful Adoption of Agentic AI Services" (CISA). It identifies five risk classes: privilege, design and configuration, behavioral, structural, and accountability (The Register). The guidance opens with the observation that "Agentic artificial intelligence (AI) systems increasingly operate across critical infrastructure and defense sectors."
The MYTHOS Playbook maps every risk class to specific chapters and appendices. Privilege risks are covered in Part II Architecture, design and configuration risks in Part II and Part VI, behavioral risks in Part III Vectors, structural risks in Chapter 8 and Part V, and accountability risks in Appendix F. The book includes a 119-cell cross-walk matrix (Appendix C) mapping Five Eyes risk classes to NIST AI RMF, OWASP LLM Top 10, OWASP Agentic Top 10, CRI FS AI RMF, and MITRE ATLAS (CRI).
The market context the guidance enters is severe. Gartner projects AI agents will be embedded in 40% of enterprise applications by the end of 2026 (Bessemer Venture Partners). One in eight enterprise breaches now involves AI agents — a 340% year-over-year increase, with 78% of compromised agents found to be over-permissioned (Digital Applied). 88% of organizations report agent-related security incidents (AGAT Software). Analysis of 18,470 production agent configurations found 98.9% lack deny rules entirely (Arun Baby).
VectorCertain's SecureAgent platform has logged 14,208 internal trials across 38 techniques and 3 adversary profiles with zero failures, delivering a Technical Evaluation Score (TES) of 1.9636 out of 2.0 (98.2%) measured against MITRE's published TES methodology. The platform achieves a false-positive rate of 1 in 160,000 — 53,333× below the EDR industry average (Gartner/Ponemon).
Joseph P. Conroy, Founder and CEO of VectorCertain LLC, said: "The Five Eyes did the hard policy work. The MYTHOS Playbook is the operational complement: the technical reference a CISO can hand to a security architect. We didn't write a book about the Five Eyes guidance — we wrote a book about the underlying threat landscape, and the Five Eyes published guidance arrived at the same risk taxonomy independently."
The MYTHOS Playbook is structured in 7 parts plus a 9-appendix reference set. Appendices include a 12-clause vendor RFP language library (Appendix G), a hash-chained audit-record sample (Appendix F), and a Clopper-Pearson exact-binomial confidence-interval worksheet (Appendix B). The book completes its manuscript-prep cycle today and proceeds to June 2026 publication.
