does that book saying anything about
post-traumatic stress syndrome? because a psychiatrist i went to said that PTSD is the cause of derealization and that it's actually kind of separate from the anxiety and if you deal with the trauma it goes away. i don't believe that but i would be interested to know what the book says.
by the way, i definitely experience it as well. it's rough, but i've learned i'm not alone in this and it's part of teh anxiety.