In this book Grojahn considers the various techniques appropriate to work with members of the patient's family. He advocates interviews with the husband or wife (sometimes both together), parents, and brothers and sisters. One aim is to determine which member of the family has the primary neurosis and should therefore be analyzed. The author states: 'On the basis of my experience with doctors' wives, I began to feel free to interview wives or husbands, mothers and fathers, and eventually, other members of the family as well … in order to re-enforce, stimulate, or to safeguard therapeutic progress. Occasionally, marginal interviews led to a collateral psychotherapeutic treatment with regular interviews… There is one limitation on the therapist's contact with a patient's partner in a complementary neurosis: he should not see a patient's lover. It is all right to see the husband or wife of the primary patient, his father, mother, sister, or brother, or, when the situation demands,