the one book we recommend here at the crisis center is Amongst Ourselves. its a workbook that is focused on the positive side of the disorder. it explains what the disorder is in a non triggering using both the DSM IV TR diagnostic criteria (which of course like all other books presently on the market, will be considered outdated when the new diagnostic criteria takes affect) but other then that we find our clients respond to the workbook positively with little to no triggering reactions. the work in the book are things like getting to know how your internal system has helped you, see how far you have come, a way to map your internal system, co-existing with your alters, how to get through /manage those addictive/maladaptive/negative ...behaviors that naturally come with being DID... theres even information in there to help people with DID to deal with partners/friends/family, therapists...

the book can be found on amazon

http://www.amazon.com/Amongst-Oursel...ntity+disorder

a more up to date book that is floating around the crisis center is Understanding and Treating Dissociative Identity Disorder: A relational Approach.

its also at amazon

http://www.amazon.com/Understanding-...ntity+disorder

I have not had my chance to read it yet but my co workers say its fantastic.