
If you are about to make your first steps with OpenSIPS: get this book. Immediately. I've read the OpenSER-related one as soon as it has been released - and I wished there was available such a book once I started working with SER/OpenSER.
If you are still unsure please stay tuned: a hardcopy is on it's way to my office. I'll provide you with an in-depth honest review - hopefully within the next two weeks
