The review of a book titled "Zawód asystenta rodziny w Polsce". The author is Izabela Krasiejko. The presented book shows the profession of family assistant, which is a relatively new occupation in the social welfare system. Izabela Krasiejko shows the family assistant as an acting subject, active and prepared for professional action, as a reflective subject, reflecting on reality and practice, focused on analysis and change, as a subject that recognises practice. The reviewed book also shows that family assistantship is a profession that faces various dilemmas and difficulties, ranging from the lack of clarity in the perception of the nature of family assistantship in its original assumptions (supporting and pedagogical, not interventional and control nature of work) to organizational dimensions of work of family assistants. The monograph by Isabella Krasiejko shows a complex and at the same time synthetic presentation of the family assistantships in the family support system. The reviewed work is an important and necessary scientific project that illustrates an innovative model of family assistantship based on subjective premises.