Hugo Award-winning writer Jason Heller makes it difficult to guess who the intended audience is for in his latest book, Strange Stars: David Bowie, Pop Music, and the Decade Sci-Fi Exploded. The non-fiction tome, which focuses in on the ’70s—the decade that gave the world Ziggy Stardust and Star Wars—feels like it’s aimed at satisfying two schools of pop culture obsessives (sci-fi geeks and music junkies) but also a general reader who has only a rudimentary knowledge of the artistic veins Heller is mining. Heller winds up serving no one especially well, getting stuck in spots where he needn’t linger and skimming over others that could have used a deep dive.