In Lab Interconnecting Cisco Networking Devices (ICND2 v3.0)
Configure Verify and Troubleshoot Multi Area OSPFv2 for IPv4
Exercise 2 - Configuring Area 2
it says right after the configurations
"Syslog messages appear that indicate adjacencies have formed between NYCORE2 and NYEDGE1 and NYEDGE2."
Looking at the diagram and configurations; it seems to me it that the adjancencies should be between NYCORE2 and NYEDGE2 and NYCORE1 but that is not what is happening.