The work presented in this book deals with the study of heavy ion reaction dynamics using the Dynamical Cluster-decay Model (DCM). DCM is used to study the decay of excited (hot and rotating) compound systems formed in low energy heavy ion reactions, including the deformations and orientations degrees of freedom for reactants/products. To study the ground state decays, the exotic cluster radioactivity, we have used the Pre-formed Cluster-decay Model (PCM), which also includes the deformation and orientation effects of daughter and cluster nuclei. We have studied the possible decay modes of various nuclear systems. The reaction dynamics of hot and rotating light as well as heavier compound systems at low energies have been studied extensively. It is relevant to mention here that the experimental studies have started analyzing the role of orientation degrees of freedom for deformed nuclei in the measured fusion-fission cross-sections, though the use/identification of the actually polarized nuclei is still to be realized. Such studies will help explore the yet unknown landscapes in order to approach towards the `island of stability' and to extend the periodic table further.