Sixty-five hours is not a listen; it is a syllabus. The (ISC)2 CISSP Certified Information Systems Security Professional Official Study Guide, ninth edition, is precisely what its title declares, and Mike Chapple’s page here is built on that considerable piece of work.
This is reference material in audio form, filed across technology, education and finance, and it should be approached accordingly. Nobody gets through it in a fortnight of commutes. It is made for candidates working towards a certification: used in sections, returned to, and cross-checked against the printed edition.
The reception has been notably strong for material of this kind, with over nine hundred listener ratings behind a score comfortably above four and a half stars, which suggests the audio genuinely works for revision rather than merely existing.