{"product_id":"supervisions-ambiguous-optical-illusions-1","title":"Supervisions: Ambiguous Optical Illusions","description":"First you see one thing, then another. The picture changes from one moment to the next, flip-flopping back and forth. That's an ambiguous illusion, and the ones in this largest-ever collection offer constant, pleasurable surprises. Sometimes, the perceptual shift occurs if you just stare at the visual puzzle long enough; in other cases, it's necessary to invert or rotate the image first. In one picture, it's a cat-and-mouse game as you try to discover where the mouse is hiding from the cat. Another image features two minstrels playing homage to William Shakespeare--but at first, only the familiar portrait of the bard may be apparent. Once the dual nature of the illusion reveals itself, you'll never see just one object again.","brand":"bookshop.lol","offers":[{"title":"Thryft - Used (Like New)","offer_id":43312359276622,"sku":"9781402718298","price":7.9,"currency_code":"SGD","in_stock":false},{"title":"Thryft - Used (Very Good)","offer_id":43312359309390,"sku":"9781402718298","price":7.9,"currency_code":"SGD","in_stock":false},{"title":"Thryft - Used (Good)","offer_id":43312359342158,"sku":"9781402718298","price":6.9,"currency_code":"SGD","in_stock":false},{"title":"Thryft - Used (Well Read)","offer_id":43312359374926,"sku":"9781402718298","price":5.9,"currency_code":"SGD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0645\/3857\/4926\/files\/720333_b63ce042-886f-40c2-9990-1f4b48edff86.jpg?v=1768178610","url":"https:\/\/bookshop.lol\/products\/supervisions-ambiguous-optical-illusions-1","provider":"bookshop.lol","version":"1.0","type":"link"}