A unique display is planned for the new Gateway alumni visitors center being built at the University of Minnesota. One room will feature a wall of books - 5,000 of them stacked in columns, row upon row, from floor to ceiling. All were written by or about university alumni, students and staff and were donated by current and former members of the University community. The alumni association expects to begin constructing the wall this week. I spoke with Margaret Carlson of the U of M alumni association, at a warehouse where the books are being sorted and catalogued. She says the wall will be part of a 2,600-square-foot room called the Heritage Gallery.