Forget the vendor hype. Here’s what makes it to the top table when security leaders plan, buy, and act. Chief Information Security Officers (CISOs) are drowning in noise. Every week brings new whitepapers, vendor webinars, analyst reports, and threat briefings, but only a handful cut through and shape decisions at the enterprise level. So, what do CISOs trust? What do they read, bookmark, cite, and share internally when building strategy or justifying spend? This article examines the forums, publications, briefings, and individuals that significantly influence CISO thinking in the UK, beyond vendor brochures.