'The Jealous One', Celia Fremlin's fifth novel, opens on its protagonist Rosamund as she wakes from a mid-morning nap to find, to her delight, that she is running a temperature. Surely that explains her blinding headache, and even the weird, delirious dream in which she had murdered her overly seductive neighbour, Lindy? A great relief, then, to find this was merely the work of a fevered imagination. Until her husband exclaims, 'Rosamund! Have you any idea what's happened to Lindy? She's disappeared'.