Oracle Spatial - Books and Resources

[Bud]

What Oracle Spatial/SDO_Geometry books or resources can you recommend?

Here are a few that I've found:

• Pro Oracle Spatial for Oracle Database 11g
• Various answers on GIS StackExchange posted by Albert Godfrind
  • Also, check out the [Spatial] tag on Stack Overflow and DBA Stack Exchange
• Oracle Spatial and Graph: What’s New?
• Oracle Spatial Forum

Are there any other resources you can recommend?

(By the way, Oracle Spatial is now free with all versions of Oracle database.)