Doc 9613 as the RNP Manual became obsolete late 2007. The current manual dates from 2008.
PBN is nothing new - it is an umbrella term encompassing RNP & RNAV and is an attempt to reduce the number of prescribed navigation specifications. There is no navigation specification named "PBN". The difference between RNP and RNAV is that the former has onboard monitoring and alerting, and is thus more appropriate in areas where surveillance is limited.