In an inspired bit of stunt casting, the creators of ''Great Discoveries'' (a new series in which name-brand authors present histories of scientific breakthroughs) have paired the ''Infinite Jest'' novelist with Georg Cantor, the inventor of transfinite math. Wallace, who professes to have a ''medium-strong amateur interest in math and formal systems,'' lays everything out clearly -- the theories, axioms, proofs, ancient paradoxes of infinity. He even tells you which bits are skippable by, alternately, the math savvy and the calculus-impaired. It's common to say that gripping books built of fact read like novels; wonderfully, this one doesn't: Wallace's straightforward engagement with ultimate abstractions and unambiguous truths offers a heady pleasure distinct from that of fiction.

