Rachelle Atalla Book order (chronological)

The next book from new, exciting writer Rachelle Atalla. 'Rachelle Atalla is a major talent and I can't wait to see where her mind goes next' Kirstin Innes, author of Scabby Queen

They're no longer allowed outside. All life is contained within four walls. But is the bunker a place of safety, or a ticking bomb?