If you develop complex products and "solutions" then the upcoming book "Tuned In" is worth a read. There are thousands of business books produced every year so how is this one special? The folks writing this book are key leaders from Pragmatic Marketing. They provide a product management framework for companies that develop, support and sell technology products. They offer training and consulting services and boast a client list that includes Microsoft, Cisco and SAP to name a few.
I took a seminar a couple of months back and highly recommend any product manager to take a look at Pragmatic's framework. It is geared for the tech. industry but I think any product manager could benefit from using parts of it. Sometimes it's better to look at things outside of your industry to get ideas and alternative thinking.