Which study guide?

bperiodbperiod Posts: 23Member ■□□□□□□□□□
I went to purchase the Cisco study guide, however there are 2 books. Which one is best?

Implementing Cisco IOS Network Security (IINS)
Foundation learning for CCNA Security IINS 640-553 exam - by Catherine Paquet

or

CCNA Security
Official Exam Certification Guide (Exam 640-553) - by Michael Watkins

Thanks

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