Jean-Jacques Greif (born in Paris in 1944) is a French journalist and writer.
He has written for the magazine Marie Claire for thirty years.
Lonek survived the concentration camp, and told his son stories of his time there, which inspired some of Greif's novels.
[4] Initially employed as an engineer, he went on to become a copywriter for an advertising company.
He and his wife founded a school,[1] and for a time he taught French and Physics[5] In 1975, he started working as a journalist for Marie Claire magazine[6][7] and carried on until 2011.