How would you like to have a disc set in the middle of your forehead which glowed pink whenever you felt sexually aroused? This is the basis of Brian Aldiss' amazingly funny and original novel, first published in 1961 and set in a near-future Britain where the discs are to be made compulsory - but not before a lot of hilarious and even frightening events occur, suggesting that perhaps it's not such a good idea to wear one's, er, `heart' on one's forehead.

The Primal Urge 2012, The Friday Project Limited, London

ISBN-13: 9780007482061

Mass-market paperback

The Primal Urge 2002, House of Stratus, North Yorkshire

ISBN-13: 9780755100590

Trade paperback

Primal Urge 1976, HarperCollins Distribution Services

ISBN-13: 9780586043806

New edition