Dorothy V.M Bishop & Laurence B Leonard 
Speech and Language Impairments in Children [PDF ebook] 
Causes, Characteristics, Intervention and Outcome

Delayed development of speech and/or language is one of the commonest reasons for parents of preschool children to seek the advice of a paediatrician.
Accessible to non-academic
Speech and Language Impairments provides an overview of recent research developments in specific speech and language impairments, written by experts in the field. Topics include normal and disordered development of problems , crosslinguistic studies, pragmatic language impairments, early identification, educational and psychiatric outcomes, acquired epileptic aphasia and experimental studies of remediation. The book concludes with a chapter by Michael Rutter that gives guidelines for conducting and evaluating research in this field.