This weekend i read the following book:
One nice excerpt is "Bringing comprehensive change to a software development organization isn't easy, and false starts are expensive."
The book has three divisions: "Aspects of Software product line engineering", "Experience Reports" and "Conclusions"
Part one covers the theoretical statements and is quite readable.
Part two presents 9 experience reports, which are not really helpful. Different companies are presented with their problems and their lessons learned. The best example is Nokia Mobile Phones - it is clear that their change to software product line has not worked very well. Nokias software for mobile phones was not a magic bullet...
Part three ("Conclusions") is much to short, to learn something.
Reading the 300 pages is at the beginning quite interesting, but after page 80 i did not get anything new or helpful...
If you are interested, take a look at my review at amazon.de. (like all my reviews: written in german ;-)