I'm interested in building my own PC. Can anyone recommend a
(UK available) book on the subject, and/or sources for parts?

Alternatively, can anyone recommend a source for a 486DX (33MHz)
PC  (again UK available). I've just seen in Computer Weekly that
the March '93 price for these has fallen to sterling 1092 (including
os, monitor, keyboard, delivery and VAT), but I can't find a single
advert that would give me a system at that price.