Mangaliso Zolo is a hapless recent graduate, still living in the southern suburbs of Cape Town near the university. Manga has an office job at a large insurance company, but he is anonymous and overlooked in this vast bureaucracy. Penumbra charts Manga's daily struggles with mental illness and the twin pull, from his many friends and acquaintances, between a reckless drug-fuelled lifestyle and charismatic Christianity. The novel brings an alternative experience of Cape Town to life, one far removed from both the gloss of tourism brochures and the familiar poverty of the Flats. Mahlangu's voice is unlike anything South African literature has yet seen and this debut novel dissects young, urban slackers in South Africa with startling precision.