This book provides a comprehensive and updated review of the concepts, models, and interventions related to the process of adjustment to life course transitions.   In times of transition, an individual is exposed to experiences that require them to assume new roles and exhibit updated behaviors. Regardless of the characteristics of these transitions, exposure to normative trajectories imposes on the person an intensive engagement in a process of (re-)adjustment. Sometimes this demand is beyond the scope of one s ability, motivation, or comprehension. Hence, some people might ineffectively perceive and/or react to the change and end up feeling unable to handle the change and inclined to escape the situation. A preventive intervention that either reduces the impact of possible risk factors or fosters possible protective factors would support the people in managing the transition.