In the late ’70s, following apocalyptic science fiction and a sojourn in soul, David Bowie set his sights on art-rock. Working with former Roxy Musician Brian Eno, he made three groundbreaking albums, Low, ”Heroes,” and Lodger, that have now been reissued with illuminating bonus tracks. Low, an experimental tightrope walk of controlled discord, is a lively clamor of guitars, synthesizers, and, on the vocal tracks, oblique lyrics of nihilism and alienation. B+