{"product":{"product_id":"0486200973","title":"Cryptanalysis: A Study of Ciphers and Their Solution (Dover Brain Games)","price":"12.69","image_url":"https://m.media-amazon.com/images/I/41T2rsUaUEL._SL500_.jpg","url":"https://www.amazon.com/dp/0486200973"},"comments":[{"body":"Helen Fouche Gaines [Cryptanalysis](https://www.amazon.ca/Cryptanalysis-Study-Ciphers-Their-Solution/dp/0486200973) I think is probably one of the best out there. I did notice it get a nod in Khan's Codebreakers. It was written before enigma, so misses a bit on ADGFXs and Quagmires and such, but it's comprehensive up to its publication date.","subreddit_name":"codes","author":"PTR47"},{"body":"Helen Fouché Gaines book is a really great place to start. [Cryptanalysis: A Study of Ciphers and Their Solution](https://www.amazon.ca/Cryptanalysis-Study-Ciphers-Their-Solution/dp/0486200973) ","subreddit_name":"codes","author":"WiredFan"},{"body":"Two good books:\r\n\r\n1) [Cryptanalysis: a study of ciphers and their solution](http://www.amazon.ca/Cryptanalysis-Study-Ciphers-Their-Solution/dp/0486200973/ref=sr_1_1?ie=UTF8\u0026amp;qid=1449856040\u0026amp;sr=8-1\u0026amp;keywords=helen+gaines) by Helen Fouché Gaines\r\n\r\n2) [Codes, Ciphers and Secret Writing](http://www.amazon.ca/Ciphers-Secret-Writing-Martin-Gardner/dp/0486247619/ref=sr_1_1?ie=UTF8\u0026amp;qid=1449856199\u0026amp;sr=8-1\u0026amp;keywords=codes+ciphers+and+secret+writing) by Martin Gardner","subreddit_name":"codes","author":"WiredFan"},{"body":"Do the codebreakers still use [Helen Gaines' book](http://www.amazon.com/Cryptanalysis-Study-Ciphers-Their-Solution/dp/0486200973/ref=sr_1_1?ie=UTF8\u0026amp;qid=1370467221\u0026amp;sr=8-1\u0026amp;keywords=helen+gaines) for reference?","subreddit_name":"IAmA","author":"lennarn"}]}