In this brief, intense, gem-like book, equal parts extended autobiographical essay and prose poem, Brodsky turns his eye to the seductive and enigmatic city of Venice. A mosaic of 48 short chapters -- each recalling a specific episode from one of his many visits there (Brodsky spent his winters in Venice for nearly 20 years) -- Watermark associatively and brilliantly evokes one city's architectural and atmospheric character.  (ITL105, $13.00)