<P><EM>Transforming Infant Wellbeing</EM> brings together science and policy to highlight the critical importance of the first 1001 days of infancy: the period from conception to the second birthday. Introduced and edited by Penelope Leach, who uniquely combines academic knowledge of infant development with the ability to write about it for wide audiences, the book has at its heart 25 original articles by acknowledged experts in different aspects of infant health and development. Brought together, they showcase innovative science and best practices to a wide range of readers: to scientific colleagues in different disciplines; to politicians and policy makers; to local authority commissioners and specialist advisors, statutory and voluntary organisations and parents.</P><P>This book has a two-fold purpose in science and in social policy. First, to collect new papers by leading scientists in a single volume, which ensures they reach a broad audience. Second, by introducing and commenting