Marjo the Only The Tar Collection Book 3: Uganda Unchained :

The third book in the Tar collection takes a rejuvenated Marjo Jones on a complicated quest through Uganda to find one of her brethren. The new drug Tar continues to ensnare everyone in it's orbit. Spike, Emilia, Mick and Willem battle with the invisible chains of love, power, greed, temptation and most importantly transformation.