To find an overview of the language disorder that you are researching, books and reference resources are a great place to start.
Reference resources are things like encyclopedias or sourcebooks, which provide general information on a given topic in a concise format. Encyclopedia articles are often a few pages long and provide a list of references for further learning.
Two great reference resources for CDS are:
(1) The SAGE Encyclopedia of Communication Sciences and Disorders -- "...an in-depth encyclopedia aimed at students interested in interdisciplinary perspectives on human communication - both normal and disordered - across the lifespan."
(2) Search the Booth Library electronic reference collection in the below box. Type in the name of the language disorder or condition you are researching, such as stuttering or cleft lip and palate.