All The Lucky Ones Are Dead (Aaron Gunner) by Gar Anthony Haywood

Open Road is doing a great job making old PI novels available again. This is a prime example.
The sixth Aaron Gunner novel tells the story of how this PI investigates the suicide of a famous rapper and bodyguards a talkshow host threatened by a Black Panther-like group he faced before.
Gunner is a tough, but believable protagonist. The LA setting is put to great use, showing us the darker parts of the rap-business. The mystery has some nice twists and turns and there's enough action to keep the excitement level high.
It should also be note that Mr. Haywood writes some excellent dialogue and manages to craf every sentence to perfection.