He was famous for his fiction from the Foundation series to I Robot, but his science books were his masterpieces of lucidity.

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The author of Dracula was also the author of the non-fiction book, Famous Imposters, which exposed hoaxes such as witchcraft and magic.

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There are comparisons to be drawn between Dr Arkin's work and the famous Three Laws of Robotics drawn up in the 1950s by Isaac Asimov, a science-fiction writer, to govern robot behaviour.

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Ackerman founded a cult magazine, Famous Monsters of Filmland, and, more lucratively, became an agent for horror and science-fiction writers.

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Not content with retirement she is working on an entirely new work of fiction, which "you could call a novel, " but does not feature her famous detective Adam Dalgliesh.

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