African Psycho by Alain Mabanckou

Gregoire Nakobomayo, a petty criminal, has decided to kill his girlfriend Germaine.

He's planned the crime for some time, but still, the act of murder requires a bit of psychological and logistical preparation. Luckily, he has a mentor to call on, the far more accomplished serial killer Angoualima.

The fact that Angoualima is dead doesn't prevent Gregoire from holding lengthy conversations with him. Little by little, Gregoire interweaves Angoualima's life and criminal exploits with his own. Continuing with the plan despite a string of botched attempts, Gregoire's final shot at offing Germaine leads to an abrupt unravelling.

Lauded in France for its fresh and witty style, African Psycho's inventive use of language surprises and relieves the reader by sending up this disturbing subject.