BPMN Modeling and reference guide

As Derek Miers commented on one of my old blog, some of my BPM maps were not compliant to BPMN. He was for sure right, and I bought the book 'BPMN Modeling and reference guide' that I really encourage people to buy and read to be fluent around BPMN. I was short cutting the approach by looking at presentations you can find on the web. You can get your own interpretation of the notation and got completly wrong. So a reference is always preferable, and with this knowledge you may arrive to design good process, at least process compliant to the intent of this standard.
The book is a must to be sure every one understand what a BPMN diagram is representing. Each BPMN modeler tool on the market has his own interpretation or 'add-on' so it is always interesting to get back to the intent of the notation and the reference. The book is illustrated with a lot of samples. Very useful.
Thanks again Derek.