IBM Rational Unified Process Reference and Certification Guide: Solution Designer (RUP) by Ahmad K. Shuja & Jochen Krebs
If you are banking on this book just for the certification, I have to say there is not much of dump set kind of question sets as the title may suggest. But from the understanding of RUP, this book serves the purpose.
If you are new to RUP; this is a good introductory book. If you are already a practitioner, I would say its not worth! however still for the certification purpose, you can glance through...
However, the book covers in detail the UMA, various phases & disciplines in RUP.
The book have some good sections on tailoring RUP & Rational Method Composer. The sample examination is a good one.