There are a number of PDFs of the Camel User Guide available here
http://activemq.apache.org/camel/manual
You can download a specific version here
Manual Versions |
|---|
Camel Manual 1.5.0 (pdf) |
Camel Manual 1.4.0 (pdf) |
Camel Manual 1.3.0 (pdf) |
Camel Manual 1.2.0 (pdf) |