Can any one suggest the best book for exam BGP - (642-661) and BGP +MPLS(642-691).
I'm also preparing for BGP+MPLS and found the ever best BGP book "BGP Design and Implementation" to study this topic. This book is fantastic and reveals the details about BGP indeed.
Other resources are also good like:
Internet Routing Architectures
BGP case studies (freely available on Cisco web)
MPLS and VPN architectures volume I and II
MPLS configuration on Cisco IOS Software
Hope this helps, rate if does