Tribune entered into a new business sector when it formed Tribune Education in 1993. The sector grew and provided high profit margins. Through 1996, Tribune used $400 million to purchase several publishers of education material: Contemporary Books, Inc., The Wright Group, Everyday Learning Corporation, Jamestown Publishers, Inc., Educational Publishing Corporation, NTC Publishing Group and Janson Publications. In 1996, this group was the number one publisher of supplemental education materials. Tribune Education acquired an 80.5% stake in mass market children's book publisher Landoll in 1997.