Co-creator Jerry Siegel writes all the stories included here. They're a pretty good representation of Siegel's interests in politics and pulp science fiction. Superman stops a war in Europe between two fictional countries and cleans up the crooked slot machine racket in Metropolis. Don't gamble, kids!
But he also battles early mad-scientist-nemesis the Ultra-Humanite, once a bald man but now with his brain transplanted into that of a Hollywood starlet. Seriously. Lex Luthor also begins his run here, not yet bald but instead red-headed. Nonetheless, he's a malevolent foe who unleashes super-science on The Man of Steel, including a heavily armed Undersea City. The Ultra-Humanite brings the atomic disintegrator. Sometimes you're fighting the gambling schemes of mobsters, sometimes you're punching out sharks and robots.
Even early in his career, the Man of Steel led a rich, full life. But he's less powerful than later iterations, less concerned with preserving the lives of his enemies if they themselves are murderers, and a whole lot punchier. It's a characterization of Superman that would probably be a lot more popular now than all the other iterations people have been trying in comics and on the big and small screens for decades. Why someone doesn't go back to the beginning is beyond me. He wisecracks like Spider-man and has only slightly more regard for the lives of his enemies than Wolverine. And he's left-wing. What's not to love? Recommended.