Going, Going, Gone! by Maddie Nixon

It’s Halloween and it’s the party of the century. Or at least it is for these kids, in this town. When Jeremy goes missing and no one remembers how the party ended, his friends undertake the search of their lifetimes. But things only get stranger. The authorities close the investigation, the adults start to forget who Jeremy is, and things in the town start to go missing. Jeremy’s friends need to figure out how to stop these disappearances before they start to disappear themselves…