Malcolm Payne 
Origins of Social Work [PDF ebook] 
Continuity and Change

This book traces the origins and development of social work as we now know it. Providing an ambitious synthesis of historical and international material, it explores the different faces of social work, whether defined by social policy developments, professionalization, changes in client group, or shifts in practice orientation. This is a unique book undertaken by an author with a strong international reputation and, as such, it promises to be a landmark for years to come in the social work literature.