The relationship between the so called boundaryless careers and the occupational wellbeing is a fascinating issue. The themes of boundaryless and protean careers are noteworthy if we consider the challenges posed by a transition to more temporary employment arrangements from an industrial to a knowledge-based economy we are facing today. The book is enriched by empirical data analysis and case studies, which on one hand allow an in-depth view of the relation between new careers and wellbeing for specialists and, on the other one, become a fertile benchmark for professionals to look at. The novelty is represented by the effort of giving such construct an interdisciplinary approach, moving from law to organizational psychology, to economy, and to occupational health.