User Guide
If you want to get more familiar with what Apache Camel has to offer, please try the following resources:
Wiki pages
PDF
You can try the Manual if you want to get a PDF of this documentation.
Other Resources.
The Apache Camel: Integration Nirvana article by Jonathan Anstey, a great place to start your journey.
The Camel in Action book.
The Camel Components Poster - Free PDF, 36"x24" Print
Try these online Articles and Tutorials.