CCENT/CCNA ICND1 100-105 Official Cert Guide – Hardcover – ACCEPTABLE
What stands out about this textbook is how clearly it explains complex theories.
CCNP and CCIE Data Center Core DCCOR 350-601 Official Cert Guide by Maloo
What stands out about this textbook is the author’s engaging writing style.
CCNP Collaboration Cloud and Edge Solutions CLCEI 300-820 Official Cert Guide
A nice touch in this textbook is the list of suggested readings at the end.