redhat certified test prep books
Red Hat RHCE 8 (EX294) Cert Guide
https://www.amazon.com/gp/product/B08F5J7LYW/
RHCSA Red Hat Enterprise Linux 8 (UPDATED): Training and Exam Preparation Guide (EX200), Second Edition
https://www.amazon.com/gp/product/B08QXP4Q2J