I bought a set of almost new set Margaret Fitzgerald - Nurse Practitioner certification CD off ebay . They stated in the add that the were for Family Nurse Practitioners wanting to study for the test. After getting them I looked on the Fitzgerald website and seen there are and Family Nurse Practitioner certification CDs and once called Nurse practitioner certification cds. The ones I got were the did not say Family on them just Nurse Practitioner Certification. What is the difference between the two? Do you think I will need to return them due the them not being FNP CDS or is the information relatively the same. Thanks in advance.