❶ The Official (ISC)2 CISSP CBK Reference (English Edition) (6th Edition, 2021/9)
❷ (ISC)2 CISSP Official Practice Tests (English Edition) (Third Edition, 2021/6)
❸ CISSP All-in-One Exam Guide (English Edition) (Ninth Edition, 2021/12)
❹ CISSP Practice Questions Exam Cram (English Edition) (Fifth Edition, 2021/8)
➎ Sunflower note, search for “cissp sunflower”, a great note for free!
❻ Youtube: search for ”it dojo”, it has so many amazing questions for free!
❼ Youtube: serach for words that you want to learn more