Now you see it, now you don't
Subtitle: the amazing world of optical illusions
By: Seymour Simon ; drawings by Constance Ftera.
Edition: Rev. ed.
Publisher: Scholastic
Published: 1999
Place of publication: New York
Number of pages: 64
ISBN-13: 9780439104845
Subjects: Optical illusions.
Other titles: Amazing world of optical illusions