Respondent Driven Sampling is an innovative sampling method that utilizes social networks to identify, survey and provide representative estimates of hard-to-reach populations. Most widely used in public health research of HIV high risk populations, RDS has, in recent years, expanded into other fields, including migration research. While the methodology in many ways is well suited for studying migrants, there are a number of unique challenges when applying this method to this population. This book provides a thorough introduction to the theoretical and practical aspects of RDS methodology by drawing upon the experiences of experts in the field as well as pioneers that have applied RDS methodology to migrant populations. The book consists of seven substantive chapters covering the various phases of survey planning, implementation and analysis. Examples from surveys already conducted among migrant populations are used to illustrate the key opportunities and challenges faced when using RDS in this population. Overall, this book is an essential tool for those interested in exploring the use of RDS to sample and analyse data from migrant populations.