Matt Hartley 
Microcosm (NHB Modern Plays) [EPUB ebook] 

A searing new play by a Bruntwood Prize-winning playwright.
Alex has his flat. His home. He's building a life with Clare. Nothing can derail his happiness – he just wishes those kids would stop hanging round outside his house. But they're just kids, with nothing to do. They're not dangerous, right?
Microcosm premiered at the Soho Theatre, London, in May 2014.
'builds suspense marvellously… chilling and ominous' The Upcoming
'Hitchcockian… an intelligent and considered piece of theatre' Huffington Post