Yin provides an essential baseline for the active researcher using the case study method.
If you are involved in researching live projects then this work is invalauble. Yin's background in case studies of political, social and economic projects of the 1980s still proves useful in the 21st century.
It is not often that one comes across methodological works that are so accessible, informative and directive.
This work can also act as a practical fieldwork guide as it methodiccally takes you through each step of the process.
Well written with many poignant examples, it is a book I go back to, again and again, thinking...
"Mmmm...I wonder what Yin said about that!".