clearly this be one of the classic example of a 60 and 70 movie adaptation of a book that be an unsung masterpiece of how you can a a producer and director of photography and set designer or special effect coordinator relay the textual concept and intention and feel of the original author in to a visual and intellectual science fiction thriller . one of my all time favorite sci fi movie ever make . the man vs. machine battle in the book be sufficiently represent in this movie but it could easily have be two hour longer to get it all in . the movie a in the book start slow with the tension build slowly until you along with the character suddenly find yourselves trap by the hope of lead edge technology with no escape . i saw the movie first before read the book which encourage me on to read the the original jones book as well a the sequel and the fall of colossus which be just a little more out there . without the degrade advantage of cgi or computer aid special effect the story rule here with some minor available technology of the day create a story a much in your head a it be in your eye . true fan of sci fi will soak this movie in and watch it a many time a they can find it . pure technological historian will see quaint real work reference to 70 bleed edge technology and can appreciate the advance over the last 40 year . a must see for pure sci fi fan .