«The Death Room II: Cab Number 538´s Driver» is the fourth book of the Dark Collection and the continuation of the «The Death Room» Dark Collection´s third book. Living anonymously in Two´s home country, accompanied by Two, Three and Her, He finds himself definitely surrendered to the strangely familiar environment he created through the kidnappings. With a new death room already assembled, the appearence of another serial killer in the picture disturbs the stability and puts His and Two´s freedom at risk. Confronted with the possibility of losing and, on top of that, with the discovery of Three´s pregnancy, He has no choice but to accept Two´s father aid.