When one begins to examine the existing literature dealing with siblings, one soon becomes aware that many separate domains of sibling research exist and that there is little connection between them; for example, sibling relationships in early childhood, genetic and environmental influences on individual differences between siblings, dysfunctional sibling relation ships, adult sibling helping relationships, sibling violence and abuse, and so on. The author's aim in writing this book was to attempt to bring together for the first time studies from diverse areas of sibling research into a...