This are the recommended books with Author, Titel, Publisher:

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Andrew Bruce Caslow                 This is the best book for
Cisco Certification                 the LAB preparation ! A must have !!!
Prentice-Hall
ISBN: 0-13-082537-9                 Price in USA: 69.99 $
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Stephen Hutnik & Michael Satterlee  Second-best prep book. A must have too.
CCIE Lab Study Guide                But: No X25-, no DEC-, no ATM-Chapters !!
McGrawHill                          (One of the authors is only CCNA)
ISBN: 0-07-135108-6                 Price in US: 80
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Douglas E. Comer                    This is the so-called "TCP-Bible"
TCP/IP Volume 1                     BTW: Volumes 2 and 3 are NOT recommended
Prentice-Hall
ISBN: 0-13-474321-0
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Mark A. Miller                       Hard to get ! A good alternativ is
The LAN Protocol Handbook            Appendix A of CIT or CID course
M&T Publishing                       A better book from Miller: see below !
ISBN: 1-55851-099-0                  Price in USA: 34.95 $
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Radia Perlman                        (also available in german language,
Interconnections - Bridges+Routers    but not recommended)
Addisson-Wesley                      Radia Perlman invented the Spanning
ISBN: 0-201-56332-0                  Tree Algerithm
Second edition:                      I recommend the second edition of course
Interconnections
Radia Perlman
Addisson-Wesley
ISBN: 0-201-63448-1
Price in US: 60 $

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Linda Chappell                       very good book on IPX with Analyser-
The Netware LANanalysis              traces 
Novell Press/Sybex
ISBN: 0-7821-1362-1                  Price in USA: 44.99 $
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Oppenheimer, Andrews, Sidhu          (Note: almost impossible to get)
Inside AppleTalk                     Actually the book is not printed
Addisson-Wesley                      anymore, but some grossists still
ISBN: 0-201-55021-0                  have it in stock
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Mark A. Miller
Troubleshooting TCP/IP
M&T Books
ISBN: 1-55851-450-3                   Price in USA: 49.95 $
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Bassam Halabi                         This book is a must have too !!!
Internet Routing Architectures        The best Cisco Press book. It focuses
Cisco Press                           mainly on BGP
ISBN: 1-56205-652-2                   Price in USA: 55.00 $
(Bassam is one of the key cisco IOS engineers and has written the
IOS code for OSPF and BGP4)
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Rossi & Rossi                         Good stuff about VLANs and trunking,
Cisco Catalyst LAN Switching          LANE and other advanced configs
McGraw-Hill
ISBN: 0-07-134982-0                   Price in US: 55 $
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Thomas & Thomas
OSPF Network Design Solutions
Cisco Press
ISBN: 1-57870-046-9			   Price in US: 55 $
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OSPF: Anatomy of an Internet Routing Protocol 
John T. Moy                          John Moy is the inventor of OSPF
Addison-Wesley 
ISBN: 0201634724                     Price at Amazon: 48 $
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