Very handy to start with project management, I always keep it on my desk and take a look at it whenever I need.
I especially appreciated the parts about human relationships and expectations, and how to deal with conflicts. For methodologies, better reading something else.
Also, I recommend it to, basically, everyone involved with projects, especially people who are just about to start working.
As a designer, it helped me to understand why some decisions are made and accept them, as a project manager, it helps me support the team and clients better.