A.S. Byatt chronicles the life of the mind with the immediacy other novelists bring to the physical world. So when the graduate-student hero of The Biographer's Tale announces that he needs "a life full of things," we take his words with a grain of salt. Yes, Phineas G. Nanson has renounced the "cross-referenced abstractions" of life as a postmodern literary theorist, and vows to ground himself in what he warily calls the "facts" (the quotation marks are definitely in order). Yet he first forays into empiricism by reading a three-volume life of the Victorian traveler, writer, and diplomat Elmer Bole--then immediately undertakes a biography of Bole's biographer, Scholes Destry-Scholes. Things, as Nanson discovers, can prove just as slippery as ideas. His research quickly leapfrogs beyond the biographer to his other subjects: scientist Carl Linnaeus, playwright Henrik Ibsen, and eugenicist Francis Galton, all of whom Destry-Scholes chronicled in three unpublished, unfinished, and, as it turns out, well-embroidered accounts. Meanwhile, our hero continues his forays into the real world. He takes a part-time job with a pair of gay travel agents, who arrange some very specialized vacations, and meets up with a Swedish bee taxonomist named Fulla, who wants to save the world. He also unearths a perplexing series of Destry-Scholes's index cards, full of sketches, facts, quotations, and unattributed lines of verse. These he attempts to shuffle into some kind o