 Leaving behind its roots in magazine publishing, it now turned to the growing market for education produced by the baby boom in the United States.Book sales had surged for reference books, textbooks, and encyclopedias and like many of the large publishers of that era such as Random House and Simon & Schuster, Crowell-Collier embarked on a merger and acquisitions spree.Crowell-Collier kicked off the decade by merging with the American Macmillan company and moved into the educational space.