Congrats to you on your child's upcoming enrollment.
These three books will give you a solid foundation:
'Shake Down The Thunder', by Murray Sperber. Simply the best source of information on the formation of that which is Notre Dame football.
'God, Country, Notre Dame', by Rev Theodore Hesburgh. Fr Hesburgh's autobiography. Obviously more than football but a must read for any newcomer to the ND community.
'Wins, Losses and Lessons', by Lou Holtz. Covers Holtz's entire career. No one conveys the passion for ND better than Lou.