Publishers Weekly reports that Houghton Mifflin’s purchase of Harcourt has been effected for $4 billion. The new company will be called the “Houghton Mifflin Harcourt Publishing Company,” with Tony Lucki serving as Chairman and CEO. The collective workforce is currently scattered across offices in Boston, San Diego, and New York. It’s unknown how the integration will be effected or whether this will entail pink slips before the New Year. But Lucki promises that the new conglomerate will “be particularly robust in the first 90 days.” Which presumably means that those who currently hold onto their jobs are safe through February, assuming that their services prove “robust” through the winter.