Here are the books on Amazon. Many are out-of-print:
1. Routing TCP/IP: Vol I 2nd Edition, by Jeff Doyle - http://amzn.to/1m792aG
2. CCIE Practical Studies, by Karl Solie - http://amzn.to/1mYG08L
3. CCNA in 60 Days, by Paul Browning - http://amzn.to/2yr9aMA
4. IP Routing Fundamentals, Mark A. Sportack - http://amzn.to/1mYGwUa
5. Cisco Field Manual: Router Configuration 2nd Edition, by David Hucaby and Steve McQuerry. - http://amzn.to/1ziHFjf
6. Cisco Certification: Bridges, Routers and Switches for CCIEs, Andrew Bruce Caslow & Valeriy Pavlichenko -
http://amzn.to/1morWcO
7. Cisco LAN Switching, by Kennedy Clark and Kevin Hamilton. - http://amzn.to/1oqQMqT
8. Enhanced IP Services for Cisco Networks, by Donald C. Lee. - http://amzn.to/1ocR1V4
9. Troubleshooting IP Routing Protocols, Zaheer Aziz, Johnson Liu, Abe Martey, Faraz Shamim - http://amzn.to/1n6o5BB
10. Cisco CCDA Simplified, by Daniel Gheorghe. - http://amzn.to/1ziIGb4
11. IPv6 Fundamentals: A Straightforward Approach to Understanding IPv6, Rick Graziani - http://amzn.to/1pTgEky
12. IP Subnetting - Zero to Guru, Paul Browning - https://amzn.to/2DMA9Hy
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Check out my IT books on Amazon:
Cisco CCNA Simplified - https://amzn.to/2MbABVy
Cisco CCNA in 60 Days - http://amzn.to/2yr9aMA
101 Labs - Cisco CCNA - https://amzn.to/2P7TuEY
101 Labs - CompTIA Network+ - https://amzn.to/2B6JlEX
101 Labs - IP Subnetting - https://amzn.to/2qWljqh
101 Labs - Cisco CCNP - https://amzn.to/2IMsDiS
IP Subnetting - Zero to Guru - https://amzn.to/2DMA9Hy