So, here it is at last: The final confrontation between Harry Potter, the Boy Who Lived, the Chosen One, the “symbol of hope” for both the Wizard and Muggle worlds, and Lord Voldemort, He Who Must Not Be Named, the nefarious leader of the Death Eaters and would-be ruler of all. Good versus Evil. Love versus Hate. The Seeker versus the Dark Lord.

J. K. Rowling’s monumental, spellbinding epic, 10 years in the making, is deeply rooted in traditional literature and Hollywood sagas — from the Greek myths to Dickens and Tolkien to “Star Wars.” And true to its roots, it ends not with modernist, “Soprano”-esque equivocation, but with good old-fashioned closure: a big-screen, heart-racing, bone-chilling confrontation and an epilogue that clearly lays out people’s fates. Getting to the finish line is not seamless — the last part of “Harry Potter and the Deathly Hallows,” the seventh and final book in the series, has some lumpy passages of exposition and a couple of clunky detours — but the overall conclusion and its determination of the main characters’ story lines possess a convincing inevitability that make some of the prepublication speculation seem curiously blinkered in retrospect.

With each installment, the “Potter” series has grown increasingly dark, and this volume — a copy of which was purchased at a New York City store yesterday, though the book is embargoed for release until 12:01 a.m. on Saturday — is no exception. While Ms. Rowling’s astonishingly limber voice still moves effortlessly between Ron’s adolescent sarcasm and Harry’s growing solemnity, from youthful exuberance to more philosophical gravity, “Deathly Hallows” is, for the most part, a somber book that marks Harry’s final initiation into the complexities and sadnesses of adulthood.

From his first days at Hogwarts, the young, green-eyed boy bore the burden of his destiny as a leader, coping with the expectations and duties of his role, and in this volume he is clearly more Henry V than Prince Hal, more King Arthur than young Wart: high-spirited war games of Quidditch have given way to real war, and Harry often wishes he were not the de facto leader of the Resistance movement, shouldering terrifying responsibilities, but an ordinary teenage boy — free to romance Ginny Weasley and hang out with his friends.