I am curious what y'all have done to your older study books.
I earned my first Cisco certification in 2001. Since then I proceeded to CCNP in 2002 and so on. Over the past four years I have gathered books for the entire CCNA, CCNP R&S and CCIE R&S tracks.
A lot of topics on the current exam have been updated in lieu of the640-xxx series, some books became partially obsolete.
The updated 642-xxx exams require me to gather a lot of additional information, partially found on CCO.
Did some of you buy new books for recertification?