Let’s be honest about copyright. The book was published in 1987 (some editions 1990). Under U.S. law, copyright lasts for 95 years from publication for corporate works. That means it is . Sharing a scanned PDF on a random file-sharing site is technically copyright infringement.
Legitimate digital access is primarily available through library loan systems or authorized retailers: Internet Archive Let’s be honest about copyright
Elias was a graduate student, which meant he was overworked, underpaid, and currently trying to debug a legacy climate model that had been written before he was born. The code was Fortran 77—a language of rigid columns, punch-card logic, and unforgiving compilers. which meant he was overworked