The Hundred Days is the 19th (and, we are told, the penultimate) instalment of O'Brian's epic. Like many of its predecessors, it features a swashbuckling plot, complete with cannon fire, exotic disguises and Aubrey's suspenseful, slow-motion pursuit of an Algerian xebek. Yet it never turns into a mere exercise in Hornblowerism. In part, this is due to O'Brian's delicate touch with character--the relationship between extroverted Aubrey and introverted Maturin has deepened with each book, and even Aubrey's reunion with his childhood companion Queenie Keith is full of novelistic nuance: "They sat smiling at one another. An odd pair: handsome creatures both, but they might have been of the same sex or neither." Nor does the author focus too exclusively on his dynamic duo. Indeed, The Hundred Days is very much a chronicle of a floating community, which Maturin describes as "his own village, his own ship's company, that complex entity so much more easily sensed than described: part of his natural habitat."

Finally, O'Brian shows his usual expertise in balancing the great events with the most minuscule ones. Other authors have written about battles at sea, and still others have recorded the rapid rise and fall of Napoleon's fortunes after his escape from confinement. But who else would give equal time--and an equal charge of delight--to Maturin's discovery of an anomalous nuthatch? --James Marcus