Houghton Mifflin Co. - 11/06/06

Houghton Mifflin Company Announces Conference Call to Discuss Third Quarter 2006 Results

BOSTON—November 6, 2006—Houghton Mifflin Company management will host a conference call for analysts and investors to discuss financial results for the quarter and nine months ended September 30, 2006, on Thursday, November 9, 2006, at 10:00 a.m. EST.

Teleconference dial-in numbers:
United States: 866-322-2542
International: 706-634-7466
Conference ID: 9127130

The teleconference will be available for replay starting on November 9, 2006, at 12:00 p.m. EST and ending on December 9, 2006, at 11:59 p.m. EST.

Replay telephone numbers:
United States: 800-642-1687
International: 706-645-9291
Conference ID: 9127130

Houghton Mifflin Chairman, President and Chief Executive Officer Tony Lucki and Executive Vice President, Chief Financial Officer and Chief Operating Officer Steve Richards will lead the call.

About Houghton Mifflin
Boston-based Houghton Mifflin Company is one of the leading educational publishers in the United States, with more than $1 billion in sales. Houghton Mifflin publishes textbooks, instructional technology, assessments and other educational materials for elementary and secondary schools and colleges. The Company also publishes an extensive line of reference works and award-winning fiction and nonfiction for adults and young readers. With its origins dating back to 1832, Houghton Mifflin combines its tradition of excellence with a commitment to innovation. The Company's Web site can be found at www.hmco.com.