He began his writing in Tunisia when his wife needed help buying local produce at the fish market.

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But how to survive in Hamburg, a good place to hunt and fish, raise a family--and where his wife works as a night nurse at Lehigh Valley Hospital?

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Kalkwarf's wife, a nurse, makes sure he gets plenty of fish oil and eats other foods enhanced with omega-3 fatty acids, which have been suggested to improve cognition.

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His lunch, which he ate on his own in an enormous, empty dining room while reading a book under the absentminded gaze of the elderly maid, and the black-and-white gaze of his deceased wife looking out from photographs in ornate silver frames, was light: soup and a small portion of fish and mashed potatoes, some of which he would allow to go cold.

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