Illuminated in a mesmerising green hue of ethereal beauty and presence, a home computer of old comes to life, leaps off a page in Sam Dyer’s latest masterpiece in the exceedingly rewarding “Visual Compendium“-series. Opening the impressive volume emulates perfectly that moment a computer is switched on, with every page impersonating the starkly coloured screen display of the titular ZX Spectrum. Sam Dyer’s “ZX Spectrum: A Visual Compendium” is a special experience of layered significance.