Jay Belsky & Teresa M. Nezworski 
Clinical Implications of Attachment [PDF ebook] 

First published in 1987. This study records findings of a study group set up to explore a variety of issues related to attachment, including the predictive utility of Strange Situation assessments, the conditions under which insecurity is related to subsequent difficulties, the origins of individual differences in attachment security, and intervention strategies that might prove useful in ameliorating the developmental risks that appeared to be associated with insecure attachment relationships