ADVERTISING; Consultant Acquires Kirkus Reviews

James B. Kobak, one of the best- known consultants in the magazine field, has acquired Kirkus Reviews, a book review service for bookstores and libraries.

His wife, Hope, was named president and chief executive officer. Ron dePaolo will serve as editor and publisher.

The publication, which comes out twice a month in looseleaf form without advertising, was founded in 1933 by the late Virginia Kirkus, who sold it to The New York Review of Books in 1970. A few years ago, it was acquired by Barbara Bader and Josh Rubins, who have now sold it to the Kobaks.