The purpose of this e-book is to answer two questions: How do temporary workers achieve well-being and optimal functioning? and How to promote commitment and productive behaviours among temporary workers? Temporary employment cannot longer be seen as exclusively bad or as a signal of labour market segmentation. Instead, mechanisms to promote commitment and productive behaviour that are beneficial for all parties involved can be identified. Temporary employment is a reality that is here to stay and that searches for mechanisms to reconcile the sometimes conflicting perspectives of employees and employers. This new approach is promising but researchers should also account and create awareness about potential and sometimes less visible drawbacks associated with temporary employment (e.g., social isolation or negative implications for career success).