This series discusses the phenomenon of Dissociative Identity Disorder and how it manifests clinically. Most importantly, it elucidates techniques necessary to help those traumatized patients heal. This Volume 4 is a collection of posts Dr. Yeung has made on his website, engagingmultiples.com/blog, since the publication of Volume 1 of the Series in 2014. The posts are in response to questions and concerns raised by members of the DID community including patients, spouses, and therapists.