Spot the difference - London, Eng. : Arcturus Publishing Ltd., c2008. - 160 p. : col. ill. ; 28 cm.

"100 amazing photographic puzzles" "5 levels: warm-up - standard - challenging - tough - expert" "The new #1 puzzle explosion!"

ISBN: 9781848370296

Subjects--Topical Terms:
Picture puzzles.
Visual perception.
Puzzles.
Perception.

Dewey Class. No.: 793.73