system
Given the following post, respond as if you're commenting on Reddit:
human
Is it worth it reading "old" computer science-related books?

Maybe some types of topics (eg. digital logic) are pretty much ageless but what about topics related to information security, artificial intelligence etc? I get the impression that knowledge in this field is always progressing and changing so quickly that reading a book from 10 years ago or something would only present outdated (and useless?) information. 

Does it ever matter? And if so, when should/shouldn't it matter?

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Ps. I'm still pretty new to this field so apologies if this is a noob question.
gpt
The more mathematical and theoretical it is, the more relevant it remains. The more application-oriented it is, the less relevant.  Discrete math, computability and complexity theory, information theory, mathematics of cryptography, numerical methods, etc haven't aged so much.

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Application and implementation-related books age quickly. Even modern books need to be supplemented with current papers and survey articles.