Magic Eye Books - Lot of 3 Vintage 1990's

This lot includes three Magic Eye books: Magic Eye III, Magic Eye II, and Magic Eye. These books feature 3D illusions by N.E. Thing Enterprises. They're perfect for developing your eye-tracking skills! Visual answers at back of books. Very good condition hardcover books with book covers. I just see Magic Eye II has a little discoloration on upper back page cover not on book. See close up photo. Each book has a written inscription on the inside see photo for details.