"Harwood's Vortex" by Robert Silverberg is a science fiction novel written in the mid-20th century. The story revolves around a malevolent scientific experiment gone awry, which results in a tumultuous invasion by otherworldly entities known as the Invaders. This work explores themes of unrestrained ambition, the consequences of scientific exploration, and the fight for survival against overwhelming odds. In the narrative, the protagonist, Chuck Matthews, finds himself embroiled in chaos after Abel Harwood’s experimental gateway to another dimension opens up, unleashing the Invaders who consume electricity and terrorize New York City. Chuck's growing concern for Laura, Harwood's daughter, escalates as the chaos unfolds, leading him to confront Harwood and the creatures he unleashed. As society crumbles under the weight of the invasion, Chuck devises a plan with Laura to close the vortex and combat the Invaders. The story culminates in a fierce confrontation, ultimately leading to the destruction of the gateway and the end of Harwood's reign of terror, leaving Chuck and Laura to face the aftermath and the daunting task of eradicating the remaining Invaders. (This is an automatically generated summary.)