{"product_id":"top-secret-ultra-greenhill-books-9781805001256-breaking-luftwaffe-ciphers-at-bletchley-park-peter-calvocoressi","title":"Top Secret Ultra","description":"\u003cp\u003e\u003cstrong\u003eTop Secret Ultra\u003c\/strong\u003e by Peter Calvocoressi, Joel Greenberg.\u003c\/p\u003e\n\u003cp\u003ePublished by Greenhill Book, (2025), Paperback, 256 pages.\u003c\/p\u003e","brand":"Peter Calvocoressi","offers":[{"title":"Default Title","offer_id":52255927304534,"sku":"9781805001256","price":21.2,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0886\/3206\/6390\/files\/9781805001256.jpg?v=1767785417","url":"https:\/\/www.englishbook.fi\/products\/top-secret-ultra-greenhill-books-9781805001256-breaking-luftwaffe-ciphers-at-bletchley-park-peter-calvocoressi","provider":"Bookshop","version":"1.0","type":"link"}