rosalena
Regarding the book - when I got serious about getting my OCD under control my therapist suggested I learn as much about OCD as I could and suggested some books that I did read. Maybe that's what your therapist meant.
As far as it being culturally based? That's just such a bizarre comment (this is the 21st century and classifying people based on ethnicity is something that dropped out of popular thinking about 100 years ago or so) that I'd ask her to explain it again.
If the explanation amounts to her saying your anxiety is related to your ethnicity then find a therapist who wants to treat you as an individual not a culture.