In 1968, Kaminsky met Susan Stanwood, a book and magazine editor for the Saturday Evening Post, and his future wife.

Along with Bennett Sims and Larry Yust, Kaminsky wrote the screenplay for the movie, Homebodies (1972), which premiered in the U.S. in September and was later released in Denmark, West Germany, Sweden, and Finland.

[3] Originally released in 1979, it was published in thirteen countries, was on the New York Times bestseller list, and sold well in France.

[5] Two months later he was offered the post of president of Hearst Corporation trade book group,[6] Avon/ William Morrow and Company, as well as six lines of children's books[7] Authors published during this time include Gore Vidal, Elmore Leonard, E.L. Doctorow, Umberto Eco, Edwin Torres, William Boyd, and David Halberstam.

These are self-help and advice books[11] Kaminsky produced the animated film, My Dog Tulip, a 2011 adaptation of the J. R. Ackerley memoir, written and directed by Paul Fierlinger, which explores the relationship between Ackerly and his German Shepherd.

A member of Council on Foreign Relations since 1989, and formerly on the board of the Association of American Publishers and the National Book Foundation, Kaminsky lived in New York and Connecticut.

He is survived by his daughter, Jessica Kaminsky, a TV writer who resides in Los Angeles with her husband, Dave Rock and two kids.