The present book titled 'The Handbook of Developmental Disabilities and Rehabilitation' attempts to clarify specific doubts and misconceptions related to the field of disability and rehabilitation. The path from disability to rehabilitation encompasses a special intervention technique called Behaviour Modification that works best with children. The book is presented as a ready reckoner and preparatory instrument for aspiring Psychologists. The take away from the book are: - Understanding of and learning the art of case intake using the proforma provided. - Learning to prepare genogram i.e., pictorial depiction of a family using diagrams. - How to write a professional case report after the detailed case study. - To understand, to prepare and use Individualized Education Plan for the purpose of educating children with exceptionality. - Understanding the depth and method of Behaviour Modification Techniques with help of two sample case studies. - Understanding of the general concept of rehabilitation with the emphasis on different models.