Thanks to Wixet of TCG for pointing out that speccy.cz now has a download for the book "Computer Games 1". This book was written by Frantisek Fuka, aka Fuxoft, and covers a lot of information about ZX Games within it's 100 pages, including it seems details of the various types of "pseudo-3d" that some games have used. Frankly you can't fault a book that features some of my favourite games, such as "Movie", and "Academy". However, you can fault the fact that it's only in Czech at the moment. Now, who has the spare time to translate it for us, eh?