Haynes build your own Electro Synth.. I kid you not..

GENUINE NEW SEALED HAYNES BUILD YOUR OWN WORKING ELECTRO SYNTHESIZER NOT SUITABLE FOR CHILDREN UNDER 14 GREAT FUN

Electronic Synthesiser Projects – Mike Berry

I remember trying to get hold of a book called Electronic Synthesiser Projects by Mike Berry. Took me ages to find one, and even then I paid through the nose. Imagine my surprise tonight, then: I found TWO copies on eBay. Not exactly cheap, but I bought them both!