{"product_id":"9781570916816","title":"Sir Cumference and the Isle of Immeter","description":"\u003cp\u003eWhen young Per visits her uncle Sir Cumference and his family, she learns how to play the game, \"Inners and Edges.\" After she finds a clue linking the game to the mysterious castle on the island of Immeter, she must figure out how to find the perimeter and area of a circle to unlock the island's secret.\u003c\/p\u003e\u003cp\u003eMath skills taught include finding the area and perimeter of a rectangle and a circle. Introduces an underlying concept of calculus — using straight lines to measure curves.\u003c\/p\u003e","brand":"Charlesbridge","offers":[{"title":"Default Title","offer_id":47049341796592,"sku":"9781570916816","price":7.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9781570916816_p0.jpg?v=1763767768","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9781570916816","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}