First i was amused, but after 50 pages i got angry and decided to write a recension at amazon about this book. If you are interested take a look here.
The recension is in german (sorry), but here a short summary:
The assumptions, which are made in this book are too simple. Yes it worked for their sample process but in real world their model will fail...
And the best:
They invented a small test program to generate test messages and put some load on their BPEL-engine (Websphere). In Oracle this stress test (s. 5.) tool is out of the box integrated into the BPEL PM.