That's great! When I (we) first heard the diagnosis, our first thought was also to research it. Unfortunately, with no money, all we could do was read excerpts online and make lists of what we
want to read lol. It's good to hear that the book is helpful.
As far as him being nice, I think a lot of people with DID are that way--simply because they've been through so much and (for me personally) I know how devastating it can be for one person (especially a "role model" whom you look up to) to use harsh words at an innoportune time.