Actually, more of the ZX Spectrum PDF emulation Bible, but this would be too long a post title... Still, oh wise and cheap-ass retroheads, just click here and you'll get yourselves the brilliant 82 pages long PDF of the aptly (and rather eloquently) named The ZX Spectrum on your PC. Brilliant, educating, handy, quite free and sporting a nice cover, this is as retro as an ebook can get.
Related @ Gnome's Lair: the AMSTRAD feature, Head over Heels, a Speccy Heroquest Hack
Related Tags: ZX Spectrum, Sinclair, Emulation, Emulator, PDF, ebook, free, Guide, Speccy, retro, gaming, games, video games, vintage