As someone pointed out in that thread, the original version of the "Dragon Book" was out in 1977, making it 45 years old:<p><a href="https://twitter.com/vinodg/status/1497632140254609408" rel="nofollow">https://twitter.com/vinodg/status/1497632140254609408</a><p>I used it in a compiler class in college in 1980, and it was already known as the "Dragon Book" back then.<p>You can still buy a used copy on Amazon:<p><a href="https://www.amazon.com/Principles-Compiler-Addison-Wesley-information-processing/dp/0201000229" rel="nofollow">https://www.amazon.com/Principles-Compiler-Addison-Wesley-in...</a>