Hi,
Depending on the depth you're looking for, you could try any of the legacy Study Guides, located here - http://www.juniper.net/us/en/training/certification/books.html.
The JNCIA-M guide has MPLS basics and basic config.
The JNCIS-M guide has more advanced MPLS topics and config.
The JNCIE-M guide has 'applied' scenarios for topics from the previous guide.
Some other links (keep searching for more)..
Understanding Junos OS Next-Generation Multicast VPNs
Interprovider and Carrier-of-Carriers VPNs Overview
Cheers,
Kieran Milne
Tech Lead, JNCP