cook book title
Currently living in France, I wrote a cook book in 1969 published by a CA publisher which I will call The XX Cook Book. Later the publisher sold out to a new company which has recently published The New XX Cook Book (exact same title + New). The new publisher claims that the current publication is totally new and separate and that the new authors had ''never seen or heard of my book'' - in spite of the title which clearly acknowledges my book. .
I claim violation of intellectual property rights. I would greatly appreciate your advice.